31155354000013 has 4 divisors (see below), whose sum is σ = 31204728571168. Its totient is φ = 31105979428860.

The previous prime is 31155353999983. The next prime is 31155354000073. The reversal of 31155354000013 is 31000045355113.

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 31155354000013 - 2⁵ = 31155353999981 is a prime.

It is a super-2 number, since 2×31155354000013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31155354000073) 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, 24687284631 + ... + 24687285892.

It is an arithmetic number, because the mean of its divisors is an integer number (7801182142792).

Almost surely, 2^{31155354000013} is an apocalyptic number.

It is an amenable number.

31155354000013 is a deficient number, since it is larger than the sum of its proper divisors (49374571155).

31155354000013 is an equidigital number, since it uses as much as digits as its factorization.

31155354000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49374571154.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 31155354000013 its reverse (31000045355113), we get a palindrome (62155399355126).

The spelling of 31155354000013 in words is "thirty-one trillion, one hundred fifty-five billion, three hundred fifty-four million, thirteen", and thus it is an aban number.