40137213 has 4 divisors (see below), whose sum is σ = 53516288. Its totient is φ = 26758140.

The previous prime is 40137203. The next prime is 40137233. The reversal of 40137213 is 31273104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40137213 - 2¹² = 40133117 is a prime.

It is a super-2 number, since 2×40137213² = 3221991734814738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40137213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40137203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6689533 + ... + 6689538.

It is an arithmetic number, because the mean of its divisors is an integer number (13379072).

Almost surely, 2^40137213 is an apocalyptic number.

It is an amenable number.

40137213 is a deficient number, since it is larger than the sum of its proper divisors (13379075).

40137213 is a wasteful number, since it uses less digits than its factorization.

40137213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13379074.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 40137213 is about 6335.3936736402. The cubic root of 40137213 is about 342.3857945902.

The spelling of 40137213 in words is "forty million, one hundred thirty-seven thousand, two hundred thirteen".