372221213 has 16 divisors (see below), whose sum is σ = 478039296. Its totient is φ = 281698560.

The previous prime is 372221183. The next prime is 372221249. The reversal of 372221213 is 312122273.

It is not a de Polignac number, because 372221213 - 2⁶ = 372221149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (372221713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86828 + ... + 91013.

It is an arithmetic number, because the mean of its divisors is an integer number (29877456).

Almost surely, 2^372221213 is an apocalyptic number.

It is an amenable number.

372221213 is a deficient number, since it is larger than the sum of its proper divisors (105818083).

372221213 is a wasteful number, since it uses less digits than its factorization.

372221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177884.

The product of its digits is 1008, while the sum is 23.

The square root of 372221213 is about 19293.0353495763. The cubic root of 372221213 is about 719.3391653880.

Adding to 372221213 its reverse (312122273), we get a palindrome (684343486).

The spelling of 372221213 in words is "three hundred seventy-two million, two hundred twenty-one thousand, two hundred thirteen".