2157881075 has 12 divisors (see below), whose sum is σ = 3058026000. Its totient is φ = 1479689760.

The previous prime is 2157881069. The next prime is 2157881081. The reversal of 2157881075 is 5701887512.

2157881075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2157881069) and next prime (2157881081).

It is not a de Polignac number, because 2157881075 - 2²² = 2153686771 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6165200 + ... + 6165549.

It is an arithmetic number, because the mean of its divisors is an integer number (254835500).

Almost surely, 2^2157881075 is an apocalyptic number.

2157881075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2157881075 is a deficient number, since it is larger than the sum of its proper divisors (900144925).

2157881075 is a wasteful number, since it uses less digits than its factorization.

2157881075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12330766 (or 12330761 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 44.

The square root of 2157881075 is about 46452.9985576819. The cubic root of 2157881075 is about 1292.2379826212.

The spelling of 2157881075 in words is "two billion, one hundred fifty-seven million, eight hundred eighty-one thousand, seventy-five".