172531308 has 24 divisors (see below), whose sum is σ = 411936448. Its totient is φ = 56172816.

The previous prime is 172531301. The next prime is 172531357. The reversal of 172531308 is 803135271.

It is not an unprimeable number, because it can be changed into a prime (172531301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166666 + ... + 167697.

Almost surely, 2^172531308 is an apocalyptic number.

It is an amenable number.

172531308 is an abundant number, since it is smaller than the sum of its proper divisors (239405140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172531308 is a wasteful number, since it uses less digits than its factorization.

172531308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334413 (or 334411 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 172531308 is about 13135.1173576790. The cubic root of 172531308 is about 556.7018163390.

Adding to 172531308 its reverse (803135271), we get a palindrome (975666579).

It can be divided in two parts, 1725 and 31308, that added together give a palindrome (33033).

The spelling of 172531308 in words is "one hundred seventy-two million, five hundred thirty-one thousand, three hundred eight".