815420131200131 has 4 divisors (see below), whose sum is σ = 815421977273064. Its totient is φ = 815418285127200.

The previous prime is 815420131200109. The next prime is 815420131200133. The reversal of 815420131200131 is 131002131024518.

815420131200131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 815420131200131 - 2¹⁸ = 815420130937987 is a prime.

It is a super-2 number, since 2×815420131200131² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815420131200133) 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, 922373750 + ... + 923257371.

It is an arithmetic number, because the mean of its divisors is an integer number (203855494318266).

Almost surely, 2^{815420131200131} is an apocalyptic number.

815420131200131 is a deficient number, since it is larger than the sum of its proper divisors (1846072933).

815420131200131 is a wasteful number, since it uses less digits than its factorization.

815420131200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846072932.

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

Adding to 815420131200131 its reverse (131002131024518), we get a palindrome (946422262224649).

The spelling of 815420131200131 in words is "eight hundred fifteen trillion, four hundred twenty billion, one hundred thirty-one million, two hundred thousand, one hundred thirty-one".