15136536226225 has 12 divisors (see below), whose sum is σ = 18769511854540. Its totient is φ = 12109095475200.

The previous prime is 15136536226193. The next prime is 15136536226289. The reversal of 15136536226225 is 52262263563151.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1321331858064 + 13815204368161 = 1149492^2 + 3716881^2 .

It is not a de Polignac number, because 15136536226225 - 2⁵ = 15136536226193 is a prime.

It is a super-2 number, since 2×15136536226225² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 992436 + ... + 5590885.

Almost surely, 2^{15136536226225} is an apocalyptic number.

It is an amenable number.

15136536226225 is a deficient number, since it is larger than the sum of its proper divisors (3632975628315).

15136536226225 is an equidigital number, since it uses as much as digits as its factorization.

15136536226225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675300 (or 6675295 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 49.

Adding to 15136536226225 its reverse (52262263563151), we get a palindrome (67398799789376).

The spelling of 15136536226225 in words is "fifteen trillion, one hundred thirty-six billion, five hundred thirty-six million, two hundred twenty-six thousand, two hundred twenty-five".