2157297737 has 8 divisors (see below), whose sum is σ = 2495188416. Its totient is φ = 1826833392.

The previous prime is 2157297731. The next prime is 2157297761. The reversal of 2157297737 is 7377927512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2157297737 - 2⁴ = 2157297721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157297731) 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, 1855958 + ... + 1857119.

It is an arithmetic number, because the mean of its divisors is an integer number (311898552).

Almost surely, 2^2157297737 is an apocalyptic number.

It is an amenable number.

2157297737 is a deficient number, since it is larger than the sum of its proper divisors (337890679).

2157297737 is an equidigital number, since it uses as much as digits as its factorization.

2157297737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713167.

The product of its digits is 1296540, while the sum is 50.

The square root of 2157297737 is about 46446.7193351694. The cubic root of 2157297737 is about 1292.1215289598.

The spelling of 2157297737 in words is "two billion, one hundred fifty-seven million, two hundred ninety-seven thousand, seven hundred thirty-seven".