55121222517 has 8 divisors (see below), whose sum is σ = 73590538560. Its totient is φ = 36699694080.

The previous prime is 55121222479. The next prime is 55121222549. The reversal of 55121222517 is 71522212155.

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

It is not a de Polignac number, because 55121222517 - 2⁷ = 55121222389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121222587) 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, 11944209 + ... + 11948822.

It is an arithmetic number, because the mean of its divisors is an integer number (9198817320).

Almost surely, 2^55121222517 is an apocalyptic number.

It is an amenable number.

55121222517 is a deficient number, since it is larger than the sum of its proper divisors (18469316043).

55121222517 is a wasteful number, since it uses less digits than its factorization.

55121222517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23893803.

The product of its digits is 14000, while the sum is 33.

The spelling of 55121222517 in words is "fifty-five billion, one hundred twenty-one million, two hundred twenty-two thousand, five hundred seventeen".