31403222013 has 4 divisors (see below), whose sum is σ = 41870962688. Its totient is φ = 20935481340.

The previous prime is 31403222009. The next prime is 31403222023. The reversal of 31403222013 is 31022230413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31403222013 - 2² = 31403222009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403222003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5233870333 + ... + 5233870338.

It is an arithmetic number, because the mean of its divisors is an integer number (10467740672).

Almost surely, 2^31403222013 is an apocalyptic number.

It is an amenable number.

31403222013 is a deficient number, since it is larger than the sum of its proper divisors (10467740675).

31403222013 is a wasteful number, since it uses less digits than its factorization.

31403222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10467740674.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31403222013 its reverse (31022230413), we get a palindrome (62425452426).

The spelling of 31403222013 in words is "thirty-one billion, four hundred three million, two hundred twenty-two thousand, thirteen".