15512421551 has 6 divisors (see below), whose sum is σ = 17050843656. Its totient is φ = 14102201300.

The previous prime is 15512421521. The next prime is 15512421563.

15512421551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 15512421551 - 2¹⁸ = 15512159407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15512421521) 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 5 ways as a sum of consecutive naturals, for example, 64100795 + ... + 64101036.

It is an arithmetic number, because the mean of its divisors is an integer number (2841807276).

Almost surely, 2^15512421551 is an apocalyptic number.

15512421551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15512421551 is a deficient number, since it is larger than the sum of its proper divisors (1538422105).

15512421551 is a wasteful number, since it uses less digits than its factorization.

15512421551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128201853 (or 128201842 counting only the distinct ones).

The product of its digits is 10000, while the sum is 32.

The spelling of 15512421551 in words is "fifteen billion, five hundred twelve million, four hundred twenty-one thousand, five hundred fifty-one".