37642221 has 12 divisors (see below), whose sum is σ = 54854748. Its totient is φ = 24872064.

The previous prime is 37642207. The next prime is 37642229. The reversal of 37642221 is 12224673.

It can be written as a sum of positive squares in 2 ways, for example, as 7502121 + 30140100 = 2739^2 + 5490^2 .

It is not a de Polignac number, because 37642221 - 2²³ = 29253613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37642229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17490 + ... + 19523.

It is an arithmetic number, because the mean of its divisors is an integer number (4571229).

Almost surely, 2^37642221 is an apocalyptic number.

It is an amenable number.

37642221 is a deficient number, since it is larger than the sum of its proper divisors (17212527).

37642221 is a wasteful number, since it uses less digits than its factorization.

37642221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37132 (or 37129 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 37642221 is about 6135.3256637280. The cubic root of 37642221 is about 335.1390853371.

Adding to 37642221 its reverse (12224673), we get a palindrome (49866894).

The spelling of 37642221 in words is "thirty-seven million, six hundred forty-two thousand, two hundred twenty-one".