15135310125013 has 6 divisors (see below), whose sum is σ = 16389122798274. Its totient is φ = 13971055499856.

The previous prime is 15135310124989. The next prime is 15135310125059. The reversal of 15135310125013 is 31052101353151.

It can be written as a sum of positive squares in 3 ways, for example, as 255027020004 + 14880283105009 = 505002^2 + 3857497^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15135310125013 is a prime.

It is a super-2 number, since 2×15135310125013² (a number of 27 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 (15135310125613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44779023870 + ... + 44779024207.

It is an arithmetic number, because the mean of its divisors is an integer number (2731520466379).

Almost surely, 2^{15135310125013} is an apocalyptic number.

15135310125013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15135310125013 is a deficient number, since it is larger than the sum of its proper divisors (1253812673261).

15135310125013 is an equidigital number, since it uses as much as digits as its factorization.

15135310125013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89558048103 (or 89558048090 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 31.

Adding to 15135310125013 its reverse (31052101353151), we get a palindrome (46187411478164).

The spelling of 15135310125013 in words is "fifteen trillion, one hundred thirty-five billion, three hundred ten million, one hundred twenty-five thousand, thirteen".