40623511531 has 4 divisors (see below), whose sum is σ = 40624028200. Its totient is φ = 40622994864.

The previous prime is 40623511493. The next prime is 40623511541. The reversal of 40623511531 is 13511532604.

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 40623511531 - 2¹³ = 40623503339 is a prime.

It is a super-2 number, since 2×40623511531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40623511493 and 40623511502.

It is not an unprimeable number, because it can be changed into a prime (40623511541) 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, 113226 + ... + 306703.

It is an arithmetic number, because the mean of its divisors is an integer number (10156007050).

Almost surely, 2^40623511531 is an apocalyptic number.

40623511531 is a deficient number, since it is larger than the sum of its proper divisors (516669).

40623511531 is an equidigital number, since it uses as much as digits as its factorization.

40623511531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516668.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 40623511531 in words is "forty billion, six hundred twenty-three million, five hundred eleven thousand, five hundred thirty-one".