37493221 has 4 divisors (see below), whose sum is σ = 37507852. Its totient is φ = 37478592.

The previous prime is 37493191. The next prime is 37493231. The reversal of 37493221 is 12239473.

37493221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35640900 + 1852321 = 5970^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 37493221 - 2²³ = 29104613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37493231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346 + ... + 8971.

It is an arithmetic number, because the mean of its divisors is an integer number (9376963).

Almost surely, 2^37493221 is an apocalyptic number.

It is an amenable number.

37493221 is a deficient number, since it is larger than the sum of its proper divisors (14631).

37493221 is a wasteful number, since it uses less digits than its factorization.

37493221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14630.

The product of its digits is 9072, while the sum is 31.

The square root of 37493221 is about 6123.1708289088. The cubic root of 37493221 is about 334.6963045546.

The spelling of 37493221 in words is "thirty-seven million, four hundred ninety-three thousand, two hundred twenty-one".