31431042404 has 6 divisors (see below), whose sum is σ = 55004324214. Its totient is φ = 15715521200.

The previous prime is 31431042389. The next prime is 31431042427. The reversal of 31431042404 is 40424013413.

It can be written as a sum of positive squares in only one way, i.e., 27649038400 + 3782004004 = 166280^2 + 61498^2 .

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 as a sum of consecutive naturals, namely, 3928880297 + ... + 3928880304.

It is an arithmetic number, because the mean of its divisors is an integer number (9167387369).

Almost surely, 2^31431042404 is an apocalyptic number.

It is an amenable number.

31431042404 is a deficient number, since it is larger than the sum of its proper divisors (23573281810).

31431042404 is a wasteful number, since it uses less digits than its factorization.

31431042404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857760605 (or 7857760603 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31431042404 its reverse (40424013413), we get a palindrome (71855055817).

The spelling of 31431042404 in words is "thirty-one billion, four hundred thirty-one million, forty-two thousand, four hundred four".