172220554 has 32 divisors (see below), whose sum is σ = 286856640. Its totient is φ = 76896000.

The previous prime is 172220539. The next prime is 172220563. The reversal of 172220554 is 455022271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397522 + ... + 397954.

It is an arithmetic number, because the mean of its divisors is an integer number (8964270).

Almost surely, 2^172220554 is an apocalyptic number.

172220554 is a deficient number, since it is larger than the sum of its proper divisors (114636086).

172220554 is a wasteful number, since it uses less digits than its factorization.

172220554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 172220554 is about 13123.2828972022. The cubic root of 172220554 is about 556.3673818012.

The spelling of 172220554 in words is "one hundred seventy-two million, two hundred twenty thousand, five hundred fifty-four".