1212153552 has 40 divisors (see below), whose sum is σ = 3479330880. Its totient is φ = 404051040.

The previous prime is 1212153541. The next prime is 1212153589. The reversal of 1212153552 is 2553512121.

1212153552 is a `hidden beast` number, since 1 + 2 + 121 + 535 + 5 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402524 + ... + 1403387.

It is an arithmetic number, because the mean of its divisors is an integer number (86983272).

Almost surely, 2^1212153552 is an apocalyptic number.

1212153552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212153552 is an abundant number, since it is smaller than the sum of its proper divisors (2267177328).

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

1212153552 is a wasteful number, since it uses less digits than its factorization.

1212153552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805928 (or 2805916 counting only the distinct ones).

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

The square root of 1212153552 is about 34815.9956341909. The cubic root of 1212153552 is about 1066.2340466097.

Adding to 1212153552 its reverse (2553512121), we get a palindrome (3765665673).

The spelling of 1212153552 in words is "one billion, two hundred twelve million, one hundred fifty-three thousand, five hundred fifty-two".