2157867530 has 64 divisors (see below), whose sum is σ = 4934780928. Its totient is φ = 660890880.

The previous prime is 2157867527. The next prime is 2157867533. The reversal of 2157867530 is 357687512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2157867527) and next prime (2157867533).

It is not an unprimeable number, because it can be changed into a prime (2157867533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10037 + ... + 66456.

It is an arithmetic number, because the mean of its divisors is an integer number (77105952).

Almost surely, 2^2157867530 is an apocalyptic number.

2157867530 is an abundant number, since it is smaller than the sum of its proper divisors (2776913398).

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

2157867530 is a wasteful number, since it uses less digits than its factorization.

2157867530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76551.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 2157867530 is about 46452.8527649272. The cubic root of 2157867530 is about 1292.2352788268.

The spelling of 2157867530 in words is "two billion, one hundred fifty-seven million, eight hundred sixty-seven thousand, five hundred thirty".