157257771 has 24 divisors (see below), whose sum is σ = 232300992. Its totient is φ = 94551600.

The previous prime is 157257743. The next prime is 157257781. The reversal of 157257771 is 177752751.

157257771 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 157257771 - 2¹⁹ = 156733483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157257781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45900 + ... + 49206.

It is an arithmetic number, because the mean of its divisors is an integer number (9679208).

Almost surely, 2^157257771 is an apocalyptic number.

157257771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157257771 is a deficient number, since it is larger than the sum of its proper divisors (75043221).

157257771 is a wasteful number, since it uses less digits than its factorization.

157257771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463 (or 3452 counting only the distinct ones).

The product of its digits is 120050, while the sum is 42.

The square root of 157257771 is about 12540.2460502177. The cubic root of 157257771 is about 539.7641528377.

The spelling of 157257771 in words is "one hundred fifty-seven million, two hundred fifty-seven thousand, seven hundred seventy-one".