2157175320 has 64 divisors (see below), whose sum is σ = 6475597920. Its totient is φ = 574884864.

The previous prime is 2157175303. The next prime is 2157175351. The reversal of 2157175320 is 235717512.

It is a happy number.

It is a super-2 number, since 2×2157175320² = 9306810722434204800, which contains 22 as substring.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 224862 + ... + 234258.

Almost surely, 2^2157175320 is an apocalyptic number.

2157175320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2157175320 is an abundant number, since it is smaller than the sum of its proper divisors (4318422600).

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

2157175320 is a wasteful number, since it uses less digits than its factorization.

2157175320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11324 (or 11320 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 2157175320 is about 46445.4014946582. The cubic root of 2157175320 is about 1292.0970877911.

The spelling of 2157175320 in words is "two billion, one hundred fifty-seven million, one hundred seventy-five thousand, three hundred twenty".