131281312532 has 12 divisors (see below), whose sum is σ = 229747410816. Its totient is φ = 65639195160.

The previous prime is 131281312529. The next prime is 131281312537. The reversal of 131281312532 is 235213182131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131281312537) 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, 148868 + ... + 533595.

It is an arithmetic number, because the mean of its divisors is an integer number (19145617568).

Almost surely, 2^131281312532 is an apocalyptic number.

It is an amenable number.

131281312532 is a deficient number, since it is larger than the sum of its proper divisors (98466098284).

131281312532 is a wasteful number, since it uses less digits than its factorization.

131281312532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730558 (or 730556 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

Multiplying 131281312532 by its sum of digits (32), we get a palindrome (4201002001024).

Adding to 131281312532 its reverse (235213182131), we get a palindrome (366494494663).

The spelling of 131281312532 in words is "one hundred thirty-one billion, two hundred eighty-one million, three hundred twelve thousand, five hundred thirty-two".