2157399357 has 8 divisors (see below), whose sum is σ = 2877248640. Its totient is φ = 1437908160.

The previous prime is 2157399323. The next prime is 2157399373. The reversal of 2157399357 is 7539937512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2157399357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157399157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75132 + ... + 99797.

It is an arithmetic number, because the mean of its divisors is an integer number (359656080).

Almost surely, 2^2157399357 is an apocalyptic number.

It is an amenable number.

2157399357 is a deficient number, since it is larger than the sum of its proper divisors (719849283).

2157399357 is a wasteful number, since it uses less digits than its factorization.

2157399357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179043.

The product of its digits is 1786050, while the sum is 51.

The square root of 2157399357 is about 46447.8132639202. The cubic root of 2157399357 is about 1292.1418172006.

The spelling of 2157399357 in words is "two billion, one hundred fifty-seven million, three hundred ninety-nine thousand, three hundred fifty-seven".