31211230413 has 24 divisors (see below), whose sum is σ = 45842414464. Its totient is φ = 18874405440.

The previous prime is 31211230409. The next prime is 31211230429. The reversal of 31211230413 is 31403211213.

It is not a de Polignac number, because 31211230413 - 2² = 31211230409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31211230413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211232413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71820 + ... + 259962.

Almost surely, 2^31211230413 is an apocalyptic number.

31211230413 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31211230413 is a deficient number, since it is larger than the sum of its proper divisors (14631184051).

31211230413 is a wasteful number, since it uses less digits than its factorization.

31211230413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188625 (or 188614 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31211230413 its reverse (31403211213), we get a palindrome (62614441626).

The spelling of 31211230413 in words is "thirty-one billion, two hundred eleven million, two hundred thirty thousand, four hundred thirteen".