2157365052 has 36 divisors (see below), whose sum is σ = 5461095640. Its totient is φ = 718098912.

The previous prime is 2157365039. The next prime is 2157365057. The reversal of 2157365052 is 2505637512.

2157365052 is a `hidden beast` number, since 21 + 573 + 65 + 0 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2157364998 and 2157365016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157365057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16738 + ... + 67785.

Almost surely, 2^2157365052 is an apocalyptic number.

It is an amenable number.

2157365052 is an abundant number, since it is smaller than the sum of its proper divisors (3303730588).

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

2157365052 is a wasteful number, since it uses less digits than its factorization.

2157365052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85242 (or 85237 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 2157365052 is about 46447.4439770371. The cubic root of 2157365052 is about 1292.1349683434.

The spelling of 2157365052 in words is "two billion, one hundred fifty-seven million, three hundred sixty-five thousand, fifty-two".