55319040013 has 2 divisors, whose sum is σ = 55319040014. Its totient is φ = 55319040012.

The previous prime is 55319039953. The next prime is 55319040017. The reversal of 55319040013 is 31004091355.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47813070244 + 7505969769 = 218662^2 + 86637^2 .

It is a cyclic number.

It is not a de Polignac number, because 55319040013 - 2³³ = 46729105421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55319040017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27659520006 + 27659520007.

It is an arithmetic number, because the mean of its divisors is an integer number (27659520007).

Almost surely, 2^55319040013 is an apocalyptic number.

It is an amenable number.

55319040013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55319040013 is an equidigital number, since it uses as much as digits as its factorization.

55319040013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 55319040013 in words is "fifty-five billion, three hundred nineteen million, forty thousand, thirteen".