55131215505 has 8 divisors (see below), whose sum is σ = 88209944832. Its totient is φ = 29403314928.

The previous prime is 55131215501. The next prime is 55131215609. The reversal of 55131215505 is 50551213155.

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

It is not a de Polignac number, because 55131215505 - 2² = 55131215501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55131215501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837707169 + ... + 1837707198.

It is an arithmetic number, because the mean of its divisors is an integer number (11026243104).

Almost surely, 2^55131215505 is an apocalyptic number.

It is an amenable number.

55131215505 is a deficient number, since it is larger than the sum of its proper divisors (33078729327).

55131215505 is a wasteful number, since it uses less digits than its factorization.

55131215505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675414375.

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 55131215505 in words is "fifty-five billion, one hundred thirty-one million, two hundred fifteen thousand, five hundred five".