40131321 has 8 divisors (see below), whose sum is σ = 53717664. Its totient is φ = 26649600.

The previous prime is 40131319. The next prime is 40131323. The reversal of 40131321 is 12313104.

It is an interprime number because it is at equal distance from previous prime (40131319) and next prime (40131323).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40131321 - 2¹ = 40131319 is a prime.

It is a super-2 number, since 2×40131321² = 3221045850410082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40131321.

It is not an unprimeable number, because it can be changed into a prime (40131323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25255 + ... + 26796.

It is an arithmetic number, because the mean of its divisors is an integer number (6714708).

Almost surely, 2^40131321 is an apocalyptic number.

It is an amenable number.

40131321 is a deficient number, since it is larger than the sum of its proper divisors (13586343).

40131321 is a wasteful number, since it uses less digits than its factorization.

40131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52311.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 40131321 is about 6334.9286499534. The cubic root of 40131321 is about 342.3690400984.

Adding to 40131321 its reverse (12313104), we get a palindrome (52444425).

The spelling of 40131321 in words is "forty million, one hundred thirty-one thousand, three hundred twenty-one".