31123402332 has 96 divisors (see below), whose sum is σ = 81473118720. Its totient is φ = 9164171520.

The previous prime is 31123402283. The next prime is 31123402339. The reversal of 31123402332 is 23320432113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123402339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4044993 + ... + 4052679.

It is an arithmetic number, because the mean of its divisors is an integer number (848678320).

Almost surely, 2^31123402332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31123402332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40736559360).

31123402332 is an abundant number, since it is smaller than the sum of its proper divisors (50349716388).

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

31123402332 is a wasteful number, since it uses less digits than its factorization.

31123402332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8571 (or 8569 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31123402332 its reverse (23320432113), we get a palindrome (54443834445).

The spelling of 31123402332 in words is "thirty-one billion, one hundred twenty-three million, four hundred two thousand, three hundred thirty-two".