31132120230 has 64 divisors (see below), whose sum is σ = 87902470080. Its totient is φ = 7813550592.

The previous prime is 31132120207. The next prime is 31132120297. The reversal of 31132120230 is 3202123113.

31132120230 is a `hidden beast` number, since 311 + 3 + 2 + 120 + 230 = 666.

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

It is a Curzon number.

It is a congruent number.

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, 3386709 + ... + 3395888.

It is an arithmetic number, because the mean of its divisors is an integer number (1373476095).

Almost surely, 2^31132120230 is an apocalyptic number.

31132120230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31132120230 is an abundant number, since it is smaller than the sum of its proper divisors (56770349850).

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

31132120230 is a wasteful number, since it uses less digits than its factorization.

31132120230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782630 (or 6782624 counting only the distinct ones).

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

Adding to 31132120230 its reverse (3202123113), we get a palindrome (34334243343).

The spelling of 31132120230 in words is "thirty-one billion, one hundred thirty-two million, one hundred twenty thousand, two hundred thirty".