40513131 has 6 divisors (see below), whose sum is σ = 58518980. Its totient is φ = 27008748.

The previous prime is 40513061. The next prime is 40513133. The reversal of 40513131 is 13131504.

It is not a de Polignac number, because 40513131 - 2⁷ = 40513003 is a prime.

It is a super-2 number, since 2×40513131² = 3282627566846322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40513133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2250721 + ... + 2250738.

Almost surely, 2^40513131 is an apocalyptic number.

40513131 is a deficient number, since it is larger than the sum of its proper divisors (18005849).

40513131 is a wasteful number, since it uses less digits than its factorization.

40513131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501465 (or 4501462 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 40513131 is about 6364.9926158637. The cubic root of 40513131 is about 343.4513829352.

Adding to 40513131 its reverse (13131504), we get a palindrome (53644635).

The spelling of 40513131 in words is "forty million, five hundred thirteen thousand, one hundred thirty-one".