15550117013 has 2 divisors, whose sum is σ = 15550117014. Its totient is φ = 15550117012.

The previous prime is 15550117003. The next prime is 15550117031. The reversal of 15550117013 is 31071105551.

Together with next prime (15550117031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8580872689 + 6969244324 = 92633^2 + 83482^2 .

It is a cyclic number.

It is not a de Polignac number, because 15550117013 - 2¹² = 15550112917 is a prime.

It is a super-2 number, since 2×15550117013² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15550117003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775058506 + 7775058507.

It is an arithmetic number, because the mean of its divisors is an integer number (7775058507).

Almost surely, 2^15550117013 is an apocalyptic number.

It is an amenable number.

15550117013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15550117013 is an equidigital number, since it uses as much as digits as its factorization.

15550117013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2625, while the sum is 29.

The spelling of 15550117013 in words is "fifteen billion, five hundred fifty million, one hundred seventeen thousand, thirteen".