172139510 has 32 divisors (see below), whose sum is σ = 315820512. Its totient is φ = 67541760.

The previous prime is 172139509. The next prime is 172139533. The reversal of 172139510 is 15931271.

172139510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129650 + ... + 130970.

It is an arithmetic number, because the mean of its divisors is an integer number (9869391).

Almost surely, 2^172139510 is an apocalyptic number.

172139510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172139510 is a deficient number, since it is larger than the sum of its proper divisors (143681002).

172139510 is a wasteful number, since it uses less digits than its factorization.

172139510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 172139510 is about 13120.1947394084. The cubic root of 172139510 is about 556.2800958341.

The spelling of 172139510 in words is "one hundred seventy-two million, one hundred thirty-nine thousand, five hundred ten".