157764231 has 6 divisors (see below), whose sum is σ = 227881680. Its totient is φ = 105176148.

The previous prime is 157764223. The next prime is 157764241. The reversal of 157764231 is 132467751.

It is a happy number.

157764231 is a `hidden beast` number, since 1 + 5 + 7 + 7 + 642 + 3 + 1 = 666.

157764231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157764231 - 2³ = 157764223 is a prime.

It is a super-2 number, since 2×157764231² = 49779105166042722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157764221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8764671 + ... + 8764688.

It is an arithmetic number, because the mean of its divisors is an integer number (37980280).

Almost surely, 2^157764231 is an apocalyptic number.

157764231 is a deficient number, since it is larger than the sum of its proper divisors (70117449).

157764231 is a wasteful number, since it uses less digits than its factorization.

157764231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529365 (or 17529362 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 157764231 is about 12560.4232014690. The cubic root of 157764231 is about 540.3429816971.

The spelling of 157764231 in words is "one hundred fifty-seven million, seven hundred sixty-four thousand, two hundred thirty-one".