172216590 has 128 divisors (see below), whose sum is σ = 512870400. Its totient is φ = 36039168.

The previous prime is 172216549. The next prime is 172216609. The reversal of 172216590 is 95612271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 543112 + ... + 543428.

It is an arithmetic number, because the mean of its divisors is an integer number (4006800).

Almost surely, 2^172216590 is an apocalyptic number.

172216590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172216590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256435200).

172216590 is an abundant number, since it is smaller than the sum of its proper divisors (340653810).

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

172216590 is a wasteful number, since it uses less digits than its factorization.

172216590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 172216590 is about 13123.1318670506. The cubic root of 172216590 is about 556.3631131330.

The spelling of 172216590 in words is "one hundred seventy-two million, two hundred sixteen thousand, five hundred ninety".