15525452551 has 12 divisors (see below), whose sum is σ = 18084494512. Its totient is φ = 13056428736.

The previous prime is 15525452549. The next prime is 15525452563.

It is a happy number.

15525452551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 15525452551 - 2¹ = 15525452549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15525453551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375126 + ... + 414451.

Almost surely, 2^15525452551 is an apocalyptic number.

15525452551 is a deficient number, since it is larger than the sum of its proper divisors (2559041961).

15525452551 is an frugal number, since it uses more digits than its factorization.

15525452551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789690 (or 789637 counting only the distinct ones).

The product of its digits is 250000, while the sum is 40.

The spelling of 15525452551 in words is "fifteen billion, five hundred twenty-five million, four hundred fifty-two thousand, five hundred fifty-one".