157171730 has 16 divisors (see below), whose sum is σ = 283920984. Its totient is φ = 62643840.

The previous prime is 157171727. The next prime is 157171733. The reversal of 157171730 is 37171751.

157171730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (157171727) and next prime (157171733).

It can be written as a sum of positive squares in 4 ways, for example, as 117267241 + 39904489 = 10829^2 + 6317^2 .

It is a super-2 number, since 2×157171730² = 49405905422385800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157171733) 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, 25157 + ... + 30776.

Almost surely, 2^157171730 is an apocalyptic number.

157171730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157171730 is a deficient number, since it is larger than the sum of its proper divisors (126749254).

157171730 is a wasteful number, since it uses less digits than its factorization.

157171730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56221.

The product of its (nonzero) digits is 5145, while the sum is 32.

The square root of 157171730 is about 12536.8149862714. The cubic root of 157171730 is about 539.6656938560.

The spelling of 157171730 in words is "one hundred fifty-seven million, one hundred seventy-one thousand, seven hundred thirty".