15225513551 has 4 divisors (see below), whose sum is σ = 15226797600. Its totient is φ = 15224229504.

The previous prime is 15225513547. The next prime is 15225513593. The reversal of 15225513551 is 15531552251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15225513551 - 2² = 15225513547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15225513521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624071 + ... + 648008.

It is an arithmetic number, because the mean of its divisors is an integer number (3806699400).

Almost surely, 2^15225513551 is an apocalyptic number.

15225513551 is a deficient number, since it is larger than the sum of its proper divisors (1284049).

15225513551 is a wasteful number, since it uses less digits than its factorization.

15225513551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284048.

The product of its digits is 37500, while the sum is 35.

The spelling of 15225513551 in words is "fifteen billion, two hundred twenty-five million, five hundred thirteen thousand, five hundred fifty-one".