2157188053 has 4 divisors (see below), whose sum is σ = 2157330880. Its totient is φ = 2157045228.

The previous prime is 2157188051. The next prime is 2157188069. The reversal of 2157188053 is 3508817512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2157188053 - 2¹ = 2157188051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2157187997 and 2157188015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157188051) 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, 45663 + ... + 79996.

It is an arithmetic number, because the mean of its divisors is an integer number (539332720).

Almost surely, 2^2157188053 is an apocalyptic number.

It is an amenable number.

2157188053 is a deficient number, since it is larger than the sum of its proper divisors (142827).

2157188053 is a wasteful number, since it uses less digits than its factorization.

2157188053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142826.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 2157188053 is about 46445.5385693825. The cubic root of 2157188053 is about 1292.0996300416.

The spelling of 2157188053 in words is "two billion, one hundred fifty-seven million, one hundred eighty-eight thousand, fifty-three".