40220699931 has 40 divisors (see below), whose sum is σ = 61400944704. Its totient is φ = 26226270720.

The previous prime is 40220699903. The next prime is 40220699963. The reversal of 40220699931 is 13999602204.

It is a happy number.

40220699931 is a `hidden beast` number, since 402 + 206 + 9 + 9 + 9 + 31 = 666.

It is not a de Polignac number, because 40220699931 - 2²¹ = 40218602779 is a prime.

It is a super-2 number, since 2×40220699931² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40220699131) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8909931 + ... + 8914443.

Almost surely, 2^40220699931 is an apocalyptic number.

40220699931 is a deficient number, since it is larger than the sum of its proper divisors (21180244773).

40220699931 is a wasteful number, since it uses less digits than its factorization.

40220699931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913 (or 6904 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 40220699931 in words is "forty billion, two hundred twenty million, six hundred ninety-nine thousand, nine hundred thirty-one".