31123123032 has 32 divisors (see below), whose sum is σ = 77819929200. Its totient is φ = 10372758144.

The previous prime is 31123123027. The next prime is 31123123039. The reversal of 31123123032 is 23032132113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123123039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61594 + ... + 256982.

Almost surely, 2^31123123032 is an apocalyptic number.

It is an amenable number.

31123123032 is an abundant number, since it is smaller than the sum of its proper divisors (46696806168).

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

31123123032 is a wasteful number, since it uses less digits than its factorization.

31123123032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202035 (or 202031 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31123123032 its reverse (23032132113), we get a palindrome (54155255145).

The spelling of 31123123032 in words is "thirty-one billion, one hundred twenty-three million, one hundred twenty-three thousand, thirty-two".