44137213 has 2 divisors, whose sum is σ = 44137214. Its totient is φ = 44137212.

The previous prime is 44137193. The next prime is 44137229. The reversal of 44137213 is 31273144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37491129 + 6646084 = 6123^2 + 2578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44137213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44137243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22068606 + 22068607.

It is an arithmetic number, because the mean of its divisors is an integer number (22068607).

Almost surely, 2^44137213 is an apocalyptic number.

It is an amenable number.

44137213 is a deficient number, since it is larger than the sum of its proper divisors (1).

44137213 is an equidigital number, since it uses as much as digits as its factorization.

44137213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 44137213 is about 6643.5843488286. The cubic root of 44137213 is about 353.4014297572.

The spelling of 44137213 in words is "forty-four million, one hundred thirty-seven thousand, two hundred thirteen".