2157031696 has 40 divisors (see below), whose sum is σ = 4407976800. Its totient is φ = 1019715840.

The previous prime is 2157031663. The next prime is 2157031697. The reversal of 2157031696 is 6961307512.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2157031697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151575 + ... + 165193.

It is an arithmetic number, because the mean of its divisors is an integer number (110199420).

Almost surely, 2^2157031696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157031696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2203988400).

2157031696 is an abundant number, since it is smaller than the sum of its proper divisors (2250945104).

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

2157031696 is a wasteful number, since it uses less digits than its factorization.

2157031696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14167 (or 14161 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 2157031696 is about 46443.8553093948. The cubic root of 2157031696 is about 1292.0684113596.

The spelling of 2157031696 in words is "two billion, one hundred fifty-seven million, thirty-one thousand, six hundred ninety-six".