31132012302 has 48 divisors (see below), whose sum is σ = 68406653952. Its totient is φ = 10231497360.

The previous prime is 31132012271. The next prime is 31132012309. The reversal of 31132012302 is 20321023113.

31132012302 is a `hidden beast` number, since 31 + 1 + 320 + 12 + 302 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132012309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368083 + ... + 444689.

It is an arithmetic number, because the mean of its divisors is an integer number (1425138624).

Almost surely, 2^31132012302 is an apocalyptic number.

31132012302 is an abundant number, since it is smaller than the sum of its proper divisors (37274641650).

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

31132012302 is a wasteful number, since it uses less digits than its factorization.

31132012302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76933 (or 76930 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31132012302 its reverse (20321023113), we get a palindrome (51453035415).

The spelling of 31132012302 in words is "thirty-one billion, one hundred thirty-two million, twelve thousand, three hundred two".