157633257 has 4 divisors (see below), whose sum is σ = 210177680. Its totient is φ = 105088836.

The previous prime is 157633249. The next prime is 157633261. The reversal of 157633257 is 752336751.

157633257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 157633257 - 2³ = 157633249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157633457) 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, 26272207 + ... + 26272212.

It is an arithmetic number, because the mean of its divisors is an integer number (52544420).

Almost surely, 2^157633257 is an apocalyptic number.

It is an amenable number.

157633257 is a deficient number, since it is larger than the sum of its proper divisors (52544423).

157633257 is an equidigital number, since it uses as much as digits as its factorization.

157633257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52544422.

The product of its digits is 132300, while the sum is 39.

The square root of 157633257 is about 12555.2083614729. The cubic root of 157633257 is about 540.1934115132.

The spelling of 157633257 in words is "one hundred fifty-seven million, six hundred thirty-three thousand, two hundred fifty-seven".