31601328102 has 24 divisors (see below), whose sum is σ = 68472817920. Its totient is φ = 10533272400.

The previous prime is 31601328089. The next prime is 31601328139. The reversal of 31601328102 is 20182310613.

It is a happy number.

31601328102 is a `hidden beast` number, since 31 + 601 + 3 + 28 + 1 + 0 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689724 + ... + 734112.

It is an arithmetic number, because the mean of its divisors is an integer number (2853034080).

Almost surely, 2^31601328102 is an apocalyptic number.

31601328102 is an abundant number, since it is smaller than the sum of its proper divisors (36871489818).

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

31601328102 is a wasteful number, since it uses less digits than its factorization.

31601328102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83948 (or 83945 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 31601328102 its reverse (20182310613), we get a palindrome (51783638715).

The spelling of 31601328102 in words is "thirty-one billion, six hundred one million, three hundred twenty-eight thousand, one hundred two".