55615515430251 has 16 divisors (see below), whose sum is σ = 84760737670400. Its totient is φ = 31775312436768.

The previous prime is 55615515430247. The next prime is 55615515430337. The reversal of 55615515430251 is 15203451551655.

It is not a de Polignac number, because 55615515430251 - 2² = 55615515430247 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 55615515430251.

It is not an unprimeable number, because it can be changed into a prime (55615515430351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207450136 + ... + 207718053.

It is an arithmetic number, because the mean of its divisors is an integer number (5297546104400).

Almost surely, 2^{55615515430251} is an apocalyptic number.

55615515430251 is a deficient number, since it is larger than the sum of its proper divisors (29145222240149).

55615515430251 is a wasteful number, since it uses less digits than its factorization.

55615515430251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415174578.

The product of its (nonzero) digits is 2250000, while the sum is 48.

The spelling of 55615515430251 in words is "fifty-five trillion, six hundred fifteen billion, five hundred fifteen million, four hundred thirty thousand, two hundred fifty-one".