1213255152 has 120 divisors (see below), whose sum is σ = 3641173200. Its totient is φ = 386762112.

The previous prime is 1213255151. The next prime is 1213255159. The reversal of 1213255152 is 2515523121.

1213255152 is a `hidden beast` number, since 12 + 132 + 5 + 515 + 2 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213255151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225874 + ... + 231182.

It is an arithmetic number, because the mean of its divisors is an integer number (30343110).

Almost surely, 2^1213255152 is an apocalyptic number.

1213255152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213255152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1820586600).

1213255152 is an abundant number, since it is smaller than the sum of its proper divisors (2427918048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213255152 is a wasteful number, since it uses less digits than its factorization.

1213255152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372 (or 5337 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1213255152 is about 34831.8123559484. The cubic root of 1213255152 is about 1066.5569451376.

Adding to 1213255152 its reverse (2515523121), we get a palindrome (3728778273).

The spelling of 1213255152 in words is "one billion, two hundred thirteen million, two hundred fifty-five thousand, one hundred fifty-two".