31244181413 has 4 divisors (see below), whose sum is σ = 31244677920. Its totient is φ = 31243684908.

The previous prime is 31244181383. The next prime is 31244181427. The reversal of 31244181413 is 31418144213.

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 a cyclic number.

It is not a de Polignac number, because 31244181413 - 2⁶ = 31244181349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31244181413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31244181613) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 137345 + ... + 285222.

It is an arithmetic number, because the mean of its divisors is an integer number (7811169480).

Almost surely, 2^31244181413 is an apocalyptic number.

It is an amenable number.

31244181413 is a deficient number, since it is larger than the sum of its proper divisors (496507).

31244181413 is an equidigital number, since it uses as much as digits as its factorization.

31244181413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496506.

The product of its digits is 9216, while the sum is 32.

The spelling of 31244181413 in words is "thirty-one billion, two hundred forty-four million, one hundred eighty-one thousand, four hundred thirteen".