31331345053 has 4 divisors (see below), whose sum is σ = 31353364288. Its totient is φ = 31309325820.

The previous prime is 31331345047. The next prime is 31331345069. The reversal of 31331345053 is 35054313313.

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 a de Polignac number, because none of the positive numbers 2^k-31331345053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331345953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11007483 + ... + 11010328.

It is an arithmetic number, because the mean of its divisors is an integer number (7838341072).

Almost surely, 2^31331345053 is an apocalyptic number.

It is an amenable number.

31331345053 is a deficient number, since it is larger than the sum of its proper divisors (22019235).

31331345053 is a wasteful number, since it uses less digits than its factorization.

31331345053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22019234.

The product of its (nonzero) digits is 24300, while the sum is 31.

Adding to 31331345053 its reverse (35054313313), we get a palindrome (66385658366).

The spelling of 31331345053 in words is "thirty-one billion, three hundred thirty-one million, three hundred forty-five thousand, fifty-three".