2157509895 has 32 divisors (see below), whose sum is σ = 3487809024. Its totient is φ = 1138800000.

The previous prime is 2157509881. The next prime is 2157509929. The reversal of 2157509895 is 5989057512.

It is not a de Polignac number, because 2157509895 - 2⁵ = 2157509863 is a prime.

It is a super-2 number, since 2×2157509895² = 9309697894045822050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 662020 + ... + 665270.

It is an arithmetic number, because the mean of its divisors is an integer number (108994032).

Almost surely, 2^2157509895 is an apocalyptic number.

2157509895 is a deficient number, since it is larger than the sum of its proper divisors (1330299129).

2157509895 is a wasteful number, since it uses less digits than its factorization.

2157509895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703.

The product of its (nonzero) digits is 1134000, while the sum is 51.

The square root of 2157509895 is about 46449.0031647612. The cubic root of 2157509895 is about 1292.1638851799.

The spelling of 2157509895 in words is "two billion, one hundred fifty-seven million, five hundred nine thousand, eight hundred ninety-five".