172824031 has 2 divisors, whose sum is σ = 172824032. Its totient is φ = 172824030.

The previous prime is 172823971. The next prime is 172824083. The reversal of 172824031 is 130428271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172824031 is a prime.

It is a super-2 number, since 2×172824031² = 59736291382177922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172824131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86412015 + 86412016.

It is an arithmetic number, because the mean of its divisors is an integer number (86412016).

Almost surely, 2^172824031 is an apocalyptic number.

172824031 is a deficient number, since it is larger than the sum of its proper divisors (1).

172824031 is an equidigital number, since it uses as much as digits as its factorization.

172824031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 172824031 is about 13146.2553984015. The cubic root of 172824031 is about 557.0164787490.

It can be divided in two parts, 1728240 and 31, that added together give a palindrome (1728271).

The spelling of 172824031 in words is "one hundred seventy-two million, eight hundred twenty-four thousand, thirty-one".