31131132230 has 32 divisors (see below), whose sum is σ = 62132371488. Its totient is φ = 11134828800.

The previous prime is 31131132199. The next prime is 31131132271. The reversal of 31131132230 is 3223113113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2313047 + ... + 2326466.

It is an arithmetic number, because the mean of its divisors is an integer number (1941636609).

Almost surely, 2^31131132230 is an apocalyptic number.

31131132230 is a deficient number, since it is larger than the sum of its proper divisors (31001239258).

31131132230 is a wasteful number, since it uses less digits than its factorization.

31131132230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639592.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31131132230 its reverse (3223113113), we get a palindrome (34354245343).

It can be divided in two parts, 31131 and 132230, that added together give a palindrome (163361).

The spelling of 31131132230 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, two hundred thirty".