72451222 has 8 divisors (see below), whose sum is σ = 112424400. Its totient is φ = 34976424.

The previous prime is 72451213. The next prime is 72451273. The reversal of 72451222 is 22215427.

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, 624522 + ... + 624637.

It is an arithmetic number, because the mean of its divisors is an integer number (14053050).

Almost surely, 2^72451222 is an apocalyptic number.

72451222 is a deficient number, since it is larger than the sum of its proper divisors (39973178).

72451222 is a wasteful number, since it uses less digits than its factorization.

72451222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249190.

The product of its digits is 2240, while the sum is 25.

The square root of 72451222 is about 8511.8283582319. The cubic root of 72451222 is about 416.8840106259.

Adding to 72451222 its reverse (22215427), we get a palindrome (94666649).

The spelling of 72451222 in words is "seventy-two million, four hundred fifty-one thousand, two hundred twenty-two".