131535018399 has 4 divisors (see below), whose sum is σ = 175380024536. Its totient is φ = 87690012264.

The previous prime is 131535018371. The next prime is 131535018401. The reversal of 131535018399 is 993810535131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131535018399 - 2²⁸ = 131266582943 is a prime.

It is a super-2 number, since 2×131535018399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131535018499) 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, 21922503064 + ... + 21922503069.

It is an arithmetic number, because the mean of its divisors is an integer number (43845006134).

Almost surely, 2^131535018399 is an apocalyptic number.

131535018399 is a deficient number, since it is larger than the sum of its proper divisors (43845006137).

131535018399 is an equidigital number, since it uses as much as digits as its factorization.

131535018399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43845006136.

The product of its (nonzero) digits is 437400, while the sum is 48.

The spelling of 131535018399 in words is "one hundred thirty-one billion, five hundred thirty-five million, eighteen thousand, three hundred ninety-nine".