45637221 has 32 divisors (see below), whose sum is σ = 76400640. Its totient is φ = 23626944.

The previous prime is 45637219. The next prime is 45637253. The reversal of 45637221 is 12273654.

It is not a de Polignac number, because 45637221 - 2¹ = 45637219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45637201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6691 + ... + 11663.

It is an arithmetic number, because the mean of its divisors is an integer number (2387520).

Almost surely, 2^45637221 is an apocalyptic number.

It is an amenable number.

45637221 is a deficient number, since it is larger than the sum of its proper divisors (30763419).

45637221 is a wasteful number, since it uses less digits than its factorization.

45637221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025.

The product of its digits is 10080, while the sum is 30.

The square root of 45637221 is about 6755.5326214888. The cubic root of 45637221 is about 357.3603764673.

The spelling of 45637221 in words is "forty-five million, six hundred thirty-seven thousand, two hundred twenty-one".