40402251231 has 32 divisors (see below), whose sum is σ = 56023591680. Its totient is φ = 25884528384.

The previous prime is 40402251203. The next prime is 40402251247. The reversal of 40402251231 is 13215220404.

It is not a de Polignac number, because 40402251231 - 2⁶ = 40402251167 is a prime.

It is a super-2 number, since 2×40402251231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402251251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1500816 + ... + 1527498.

It is an arithmetic number, because the mean of its divisors is an integer number (1750737240).

Almost surely, 2^40402251231 is an apocalyptic number.

40402251231 is a deficient number, since it is larger than the sum of its proper divisors (15621340449).

40402251231 is a wasteful number, since it uses less digits than its factorization.

40402251231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26935.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 40402251231 its reverse (13215220404), we get a palindrome (53617471635).

The spelling of 40402251231 in words is "forty billion, four hundred two million, two hundred fifty-one thousand, two hundred thirty-one".