131513501636 has 96 divisors (see below), whose sum is σ = 276116843520. Its totient is φ = 54103420800.

The previous prime is 131513501629. The next prime is 131513501663. The reversal of 131513501636 is 636105315131.

It is a super-2 number, since 2×131513501636² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131513501596 and 131513501605.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17436026 + ... + 17443566.

It is an arithmetic number, because the mean of its divisors is an integer number (2876217120).

Almost surely, 2^131513501636 is an apocalyptic number.

It is an amenable number.

131513501636 is an abundant number, since it is smaller than the sum of its proper divisors (144603341884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131513501636 is a wasteful number, since it uses less digits than its factorization.

131513501636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8505 (or 8503 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

Adding to 131513501636 its reverse (636105315131), we get a palindrome (767618816767).

The spelling of 131513501636 in words is "one hundred thirty-one billion, five hundred thirteen million, five hundred one thousand, six hundred thirty-six".