15216510005551 has 8 divisors (see below), whose sum is σ = 15552029617344. Its totient is φ = 14881480563840.

The previous prime is 15216510005509. The next prime is 15216510005579. The reversal of 15216510005551 is 15550001561251.

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

It is a cyclic number.

It is not a de Polignac number, because 15216510005551 - 2¹¹ = 15216510003503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15216510005551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15216510000551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122479750 + ... + 122603923.

It is an arithmetic number, because the mean of its divisors is an integer number (1944003702168).

Almost surely, 2^{15216510005551} is an apocalyptic number.

15216510005551 is a deficient number, since it is larger than the sum of its proper divisors (335519611793).

15216510005551 is a wasteful number, since it uses less digits than its factorization.

15216510005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245085041.

The product of its (nonzero) digits is 37500, while the sum is 37.

The spelling of 15216510005551 in words is "fifteen trillion, two hundred sixteen billion, five hundred ten million, five thousand, five hundred fifty-one".