40005651331 has 4 divisors (see below), whose sum is σ = 40006561032. Its totient is φ = 40004741632.

The previous prime is 40005651307. The next prime is 40005651397. The reversal of 40005651331 is 13315650004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40005651331 - 2¹⁵ = 40005618563 is a prime.

It is a super-2 number, since 2×40005651331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40005651331.

It is not an unprimeable number, because it can be changed into a prime (40005651131) 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, 385345 + ... + 478018.

It is an arithmetic number, because the mean of its divisors is an integer number (10001640258).

Almost surely, 2^40005651331 is an apocalyptic number.

40005651331 is a deficient number, since it is larger than the sum of its proper divisors (909701).

40005651331 is an equidigital number, since it uses as much as digits as its factorization.

40005651331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909700.

The product of its (nonzero) digits is 5400, while the sum is 28.

The spelling of 40005651331 in words is "forty billion, five million, six hundred fifty-one thousand, three hundred thirty-one".