31102423400 has 24 divisors (see below), whose sum is σ = 72313134870. Its totient is φ = 12440969280.

The previous prime is 31102423397. The next prime is 31102423427. The reversal of 31102423400 is 432420113.

It can be written as a sum of positive squares in 3 ways, for example, as 19568092996 + 11534330404 = 139886^2 + 107398^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 77755859 + ... + 77756258.

Almost surely, 2^31102423400 is an apocalyptic number.

It is an amenable number.

31102423400 is an abundant number, since it is smaller than the sum of its proper divisors (41210711470).

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

31102423400 is a wasteful number, since it uses less digits than its factorization.

31102423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155512133 (or 155512124 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31102423400 its reverse (432420113), we get a palindrome (31534843513).

The spelling of 31102423400 in words is "thirty-one billion, one hundred two million, four hundred twenty-three thousand, four hundred".