2157872223 has 16 divisors (see below), whose sum is σ = 3205329120. Its totient is φ = 1282130304.

The previous prime is 2157872219. The next prime is 2157872231. The reversal of 2157872223 is 3222787512.

It is not a de Polignac number, because 2157872223 - 2² = 2157872219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157872023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952836 + ... + 955097.

It is an arithmetic number, because the mean of its divisors is an integer number (200333070).

Almost surely, 2^2157872223 is an apocalyptic number.

2157872223 is a deficient number, since it is larger than the sum of its proper divisors (1047456897).

2157872223 is a wasteful number, since it uses less digits than its factorization.

2157872223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907978.

The product of its digits is 94080, while the sum is 39.

The square root of 2157872223 is about 46452.9032784820. The cubic root of 2157872223 is about 1292.2362156245.

The spelling of 2157872223 in words is "two billion, one hundred fifty-seven million, eight hundred seventy-two thousand, two hundred twenty-three".