31132231002 has 48 divisors (see below), whose sum is σ = 71558451432. Its totient is φ = 9748177920.

The previous prime is 31132230973. The next prime is 31132231021. The reversal of 31132231002 is 20013223113.

31132231002 is a `hidden beast` number, since 31 + 1 + 322 + 310 + 0 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 29846363121 + 1285867881 = 172761^2 + 35859^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61788 + ... + 257064.

Almost surely, 2^31132231002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31132231002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35779225716).

31132231002 is an abundant number, since it is smaller than the sum of its proper divisors (40426220430).

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

31132231002 is a wasteful number, since it uses less digits than its factorization.

31132231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195823 (or 195820 counting only the distinct ones).

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

Adding to 31132231002 its reverse (20013223113), we get a palindrome (51145454115).

The spelling of 31132231002 in words is "thirty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, two".