15505000251 has 8 divisors (see below), whose sum is σ = 22263590160. Its totient is φ = 9541538592.

The previous prime is 15505000237. The next prime is 15505000261. The reversal of 15505000251 is 15200050551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15505000251 - 2⁷ = 15505000123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15505000261) 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 7 ways as a sum of consecutive naturals, for example, 198782016 + ... + 198782093.

It is an arithmetic number, because the mean of its divisors is an integer number (2782948770).

Almost surely, 2^15505000251 is an apocalyptic number.

15505000251 is a deficient number, since it is larger than the sum of its proper divisors (6758589909).

15505000251 is a wasteful number, since it uses less digits than its factorization.

15505000251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397564125.

The product of its (nonzero) digits is 1250, while the sum is 24.

The spelling of 15505000251 in words is "fifteen billion, five hundred five million, two hundred fifty-one", and thus it is an aban number.