31403220426 has 16 divisors (see below), whose sum is σ = 69784934400. Its totient is φ = 10467740124.

The previous prime is 31403220391. The next prime is 31403220521. The reversal of 31403220426 is 62402230413.

31403220426 is a `hidden beast` number, since 3 + 14 + 0 + 3 + 220 + 426 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 31403220426.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290770506 + ... + 290770613.

It is an arithmetic number, because the mean of its divisors is an integer number (4361558400).

Almost surely, 2^31403220426 is an apocalyptic number.

31403220426 is an abundant number, since it is smaller than the sum of its proper divisors (38381713974).

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

31403220426 is a wasteful number, since it uses less digits than its factorization.

31403220426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581541130 (or 581541124 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 31403220426 its reverse (62402230413), we get a palindrome (93805450839).

The spelling of 31403220426 in words is "thirty-one billion, four hundred three million, two hundred twenty thousand, four hundred twenty-six".