2157508516 has 12 divisors (see below), whose sum is σ = 3802803760. Its totient is φ = 1070993160.

The previous prime is 2157508513. The next prime is 2157508547. The reversal of 2157508516 is 6158057512.

It is a happy number.

It is a super-2 number, since 2×2157508516² = 9309685993225044512, which contains 22 as substring.

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 (2157508511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939650 + ... + 1940761.

Almost surely, 2^2157508516 is an apocalyptic number.

It is an amenable number.

2157508516 is a deficient number, since it is larger than the sum of its proper divisors (1645295244).

2157508516 is a wasteful number, since it uses less digits than its factorization.

2157508516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880554 (or 3880552 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 40.

The square root of 2157508516 is about 46448.9883205221. The cubic root of 2157508516 is about 1292.1636098788.

The spelling of 2157508516 in words is "two billion, one hundred fifty-seven million, five hundred eight thousand, five hundred sixteen".