2157000356 has 12 divisors (see below), whose sum is σ = 4314000768. Its totient is φ = 924428712.

The previous prime is 2157000343. The next prime is 2157000361. The reversal of 2157000356 is 6530007512.

2157000356 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38517836 + ... + 38517891.

It is an arithmetic number, because the mean of its divisors is an integer number (359500064).

Almost surely, 2^2157000356 is an apocalyptic number.

It is an amenable number.

2157000356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2157000356 is a wasteful number, since it uses less digits than its factorization.

2157000356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77035738 (or 77035736 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 2157000356 is about 46443.5179115450. The cubic root of 2157000356 is about 1292.0621537449.

Adding to 2157000356 its reverse (6530007512), we get a palindrome (8687007868).

The spelling of 2157000356 in words is "two billion, one hundred fifty-seven million, three hundred fifty-six", and thus it is an aban number.