1213855232 has 20 divisors (see below), whose sum is σ = 2425340676. Its totient is φ = 606927360.

The previous prime is 1213855219. The next prime is 1213855241. The reversal of 1213855232 is 2325583121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1184894 + ... + 1185917.

Almost surely, 2^1213855232 is an apocalyptic number.

It is an amenable number.

1213855232 is a deficient number, since it is larger than the sum of its proper divisors (1211485444).

1213855232 is an frugal number, since it uses more digits than its factorization.

1213855232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370829 (or 2370813 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 1213855232 is about 34840.4252557284. The cubic root of 1213855232 is about 1066.7327570161.

The spelling of 1213855232 in words is "one billion, two hundred thirteen million, eight hundred fifty-five thousand, two hundred thirty-two".