55215121227715 has 24 divisors (see below), whose sum is σ = 69929762207760. Its totient is φ = 41846767833024.

The previous prime is 55215121227683. The next prime is 55215121227733. The reversal of 55215121227715 is 51772212151255.

It is not a de Polignac number, because 55215121227715 - 2⁵ = 55215121227683 is a prime.

It is a super-2 number, since 2×55215121227715² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280071757 + ... + 280268833.

It is an arithmetic number, because the mean of its divisors is an integer number (2913740091990).

Almost surely, 2^{55215121227715} is an apocalyptic number.

55215121227715 is a deficient number, since it is larger than the sum of its proper divisors (14714640980045).

55215121227715 is a wasteful number, since it uses less digits than its factorization.

55215121227715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352339 (or 352320 counting only the distinct ones).

The product of its digits is 490000, while the sum is 46.

The spelling of 55215121227715 in words is "fifty-five trillion, two hundred fifteen billion, one hundred twenty-one million, two hundred twenty-seven thousand, seven hundred fifteen".