40812161531 has 2 divisors, whose sum is σ = 40812161532. Its totient is φ = 40812161530.

The previous prime is 40812161521. The next prime is 40812161539. The reversal of 40812161531 is 13516121804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40812161531 - 2¹⁰ = 40812160507 is a prime.

It is a super-2 number, since 2×40812161531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40812161539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20406080765 + 20406080766.

It is an arithmetic number, because the mean of its divisors is an integer number (20406080766).

Almost surely, 2^40812161531 is an apocalyptic number.

40812161531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40812161531 is an equidigital number, since it uses as much as digits as its factorization.

40812161531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

It can be divided in two parts, 4081 and 2161531, that added together give a palindrome (2165612).

The spelling of 40812161531 in words is "forty billion, eight hundred twelve million, one hundred sixty-one thousand, five hundred thirty-one".