15052557521 has 2 divisors, whose sum is σ = 15052557522. Its totient is φ = 15052557520.

The previous prime is 15052557491. The next prime is 15052557539. The reversal of 15052557521 is 12575525051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13211203600 + 1841353921 = 114940^2 + 42911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15052557521 is a prime.

It is not a weakly prime, because it can be changed into another prime (15052557721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7526278760 + 7526278761.

It is an arithmetic number, because the mean of its divisors is an integer number (7526278761).

Almost surely, 2^15052557521 is an apocalyptic number.

It is an amenable number.

15052557521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15052557521 is an equidigital number, since it uses as much as digits as its factorization.

15052557521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87500, while the sum is 38.

The spelling of 15052557521 in words is "fifteen billion, fifty-two million, five hundred fifty-seven thousand, five hundred twenty-one".