31431404403100 has 72 divisors (see below), whose sum is σ = 75437984521088. Its totient is φ = 11291781024000.

The previous prime is 31431404403041. The next prime is 31431404403181. The reversal of 31431404403100 is 130440413413.

It is a happy number.

It is a super-2 number, since 2×31431404403100² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326681676 + ... + 326777875.

Almost surely, 2^{31431404403100} is an apocalyptic number.

It is an amenable number.

31431404403100 is an abundant number, since it is smaller than the sum of its proper divisors (44006580117988).

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

31431404403100 is a wasteful number, since it uses less digits than its factorization.

31431404403100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653459615 (or 653459608 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31431404403100 its reverse (130440413413), we get a palindrome (31561844816513).

The spelling of 31431404403100 in words is "thirty-one trillion, four hundred thirty-one billion, four hundred four million, four hundred three thousand, one hundred".