172221902 has 8 divisors (see below), whose sum is σ = 265314936. Its totient is φ = 83783592.

The previous prime is 172221877. The next prime is 172221911. The reversal of 172221902 is 209122271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163588 + ... + 1163735.

It is an arithmetic number, because the mean of its divisors is an integer number (33164367).

Almost surely, 2^172221902 is an apocalyptic number.

172221902 is a deficient number, since it is larger than the sum of its proper divisors (93093034).

172221902 is a wasteful number, since it uses less digits than its factorization.

172221902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327362.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 172221902 is about 13123.3342562018. The cubic root of 172221902 is about 556.3688333919.

The spelling of 172221902 in words is "one hundred seventy-two million, two hundred twenty-one thousand, nine hundred two".