1213132650 has 48 divisors (see below), whose sum is σ = 3011973888. Its totient is φ = 323136000.

The previous prime is 1213132649. The next prime is 1213132663. The reversal of 1213132650 is 562313121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213132650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144570 + ... + 152730.

It is an arithmetic number, because the mean of its divisors is an integer number (62749456).

Almost surely, 2^1213132650 is an apocalyptic number.

1213132650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213132650 is an abundant number, since it is smaller than the sum of its proper divisors (1798841238).

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

1213132650 is a wasteful number, since it uses less digits than its factorization.

1213132650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9167 (or 9162 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1213132650 is about 34830.0538328611. The cubic root of 1213132650 is about 1066.5210472870.

Adding to 1213132650 its reverse (562313121), we get a palindrome (1775445771).

The spelling of 1213132650 in words is "one billion, two hundred thirteen million, one hundred thirty-two thousand, six hundred fifty".