172727157 has 32 divisors (see below), whose sum is σ = 257904000. Its totient is φ = 102187008.

The previous prime is 172727131. The next prime is 172727237. The reversal of 172727157 is 751727271.

It is not a de Polignac number, because 172727157 - 2¹⁰ = 172726133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172727057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384469 + ... + 384917.

It is an arithmetic number, because the mean of its divisors is an integer number (8059500).

Almost surely, 2^172727157 is an apocalyptic number.

172727157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

172727157 is a deficient number, since it is larger than the sum of its proper divisors (85176843).

172727157 is a wasteful number, since it uses less digits than its factorization.

172727157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885.

The product of its digits is 48020, while the sum is 39.

The square root of 172727157 is about 13142.5704106921. The cubic root of 172727157 is about 556.9123834651.

The spelling of 172727157 in words is "one hundred seventy-two million, seven hundred twenty-seven thousand, one hundred fifty-seven".