40531313 has 16 divisors (see below), whose sum is σ = 44910720. Its totient is φ = 36406656.

The previous prime is 40531259. The next prime is 40531319. The reversal of 40531313 is 31313504.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40531313 - 2¹⁸ = 40269169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40531319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59531 + ... + 60207.

It is an arithmetic number, because the mean of its divisors is an integer number (2806920).

Almost surely, 2^40531313 is an apocalyptic number.

It is an amenable number.

40531313 is a deficient number, since it is larger than the sum of its proper divisors (4379407).

40531313 is a wasteful number, since it uses less digits than its factorization.

40531313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 40531313 is about 6366.4207369604. The cubic root of 40531313 is about 343.5027547492.

Adding to 40531313 its reverse (31313504), we get a palindrome (71844817).

The spelling of 40531313 in words is "forty million, five hundred thirty-one thousand, three hundred thirteen".