37221372 has 18 divisors (see below), whose sum is σ = 94087448. Its totient is φ = 12407112.

The previous prime is 37221319. The next prime is 37221391. The reversal of 37221372 is 27312273.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 516928 + ... + 516999.

Almost surely, 2^37221372 is an apocalyptic number.

It is an amenable number.

37221372 is an abundant number, since it is smaller than the sum of its proper divisors (56866076).

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

37221372 is a wasteful number, since it uses less digits than its factorization.

37221372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033937 (or 1033932 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 37221372 is about 6100.9320599397. The cubic root of 37221372 is about 333.8854233074.

Subtracting from 37221372 its reverse (27312273), we obtain a palindrome (9909099).

The spelling of 37221372 in words is "thirty-seven million, two hundred twenty-one thousand, three hundred seventy-two".