15513145273 has 2 divisors, whose sum is σ = 15513145274. Its totient is φ = 15513145272.

The previous prime is 15513145187. The next prime is 15513145279. The reversal of 15513145273 is 37254131551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8626137129 + 6887008144 = 92877^2 + 82988^2 .

It is a cyclic number.

It is not a de Polignac number, because 15513145273 - 2¹⁷ = 15513014201 is a prime.

It is a super-2 number, since 2×15513145273² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15513145279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7756572636 + 7756572637.

It is an arithmetic number, because the mean of its divisors is an integer number (7756572637).

Almost surely, 2^15513145273 is an apocalyptic number.

It is an amenable number.

15513145273 is a deficient number, since it is larger than the sum of its proper divisors (1).

15513145273 is an equidigital number, since it uses as much as digits as its factorization.

15513145273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 37.

The spelling of 15513145273 in words is "fifteen billion, five hundred thirteen million, one hundred forty-five thousand, two hundred seventy-three".