1231853916 has 12 divisors (see below), whose sum is σ = 2874325832. Its totient is φ = 410617968.

The previous prime is 1231853827. The next prime is 1231853933. The reversal of 1231853916 is 6193581321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51327235 + ... + 51327258.

Almost surely, 2^1231853916 is an apocalyptic number.

It is an amenable number.

1231853916 is an abundant number, since it is smaller than the sum of its proper divisors (1642471916).

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

1231853916 is a wasteful number, since it uses less digits than its factorization.

1231853916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102654500 (or 102654498 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 1231853916 is about 35097.7765107706. The cubic root of 1231853916 is about 1071.9793089773.

The spelling of 1231853916 in words is "one billion, two hundred thirty-one million, eight hundred fifty-three thousand, nine hundred sixteen".