31404433344213 has 16 divisors (see below), whose sum is σ = 42164331142016. Its totient is φ = 20790507297600.

The previous prime is 31404433344199. The next prime is 31404433344217. The reversal of 31404433344213 is 31244333440413.

It is not a de Polignac number, because 31404433344213 - 2⁶ = 31404433344149 is a prime.

It is a super-2 number, since 2×31404433344213² (a number of 28 digits) contains 22 as substring.

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 (31404433344217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10561606 + ... + 13204407.

It is an arithmetic number, because the mean of its divisors is an integer number (2635270696376).

Almost surely, 2^{31404433344213} is an apocalyptic number.

It is an amenable number.

31404433344213 is a deficient number, since it is larger than the sum of its proper divisors (10759897797803).

31404433344213 is a wasteful number, since it uses less digits than its factorization.

31404433344213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23769084.

The product of its (nonzero) digits is 497664, while the sum is 39.

Adding to 31404433344213 its reverse (31244333440413), we get a palindrome (62648766784626).

The spelling of 31404433344213 in words is "thirty-one trillion, four hundred four billion, four hundred thirty-three million, three hundred forty-four thousand, two hundred thirteen".