172216304 has 40 divisors (see below), whose sum is σ = 378257040. Its totient is φ = 75299328.

The previous prime is 172216259. The next prime is 172216313. The reversal of 172216304 is 403612271.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17837 + ... + 25740.

It is an arithmetic number, because the mean of its divisors is an integer number (9456426).

Almost surely, 2^172216304 is an apocalyptic number.

It is an amenable number.

172216304 is an abundant number, since it is smaller than the sum of its proper divisors (206040736).

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

172216304 is a wasteful number, since it uses less digits than its factorization.

172216304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43617 (or 43611 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 172216304 is about 13123.1209702570. The cubic root of 172216304 is about 556.3628051488.

Adding to 172216304 its reverse (403612271), we get a palindrome (575828575).

The spelling of 172216304 in words is "one hundred seventy-two million, two hundred sixteen thousand, three hundred four".