31132312330 has 128 divisors (see below), whose sum is σ = 68976230400. Its totient is φ = 9874953216.

The previous prime is 31132312327. The next prime is 31132312333. The reversal of 31132312330 is 3321323113.

It is an interprime number because it is at equal distance from previous prime (31132312327) and next prime (31132312333).

It is not an unprimeable number, because it can be changed into a prime (31132312333) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17697991 + ... + 17699749.

It is an arithmetic number, because the mean of its divisors is an integer number (538876800).

Almost surely, 2^31132312330 is an apocalyptic number.

31132312330 is an abundant number, since it is smaller than the sum of its proper divisors (37843918070).

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

31132312330 is a wasteful number, since it uses less digits than its factorization.

31132312330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31132312330 its reverse (3321323113), we get a palindrome (34453635443).

The spelling of 31132312330 in words is "thirty-one billion, one hundred thirty-two million, three hundred twelve thousand, three hundred thirty".