55121123415 has 16 divisors (see below), whose sum is σ = 88219569888. Its totient is φ = 29389341696.

The previous prime is 55121123359. The next prime is 55121123417. The reversal of 55121123415 is 51432112155.

It is not a de Polignac number, because 55121123415 - 2⁷ = 55121123287 is a prime.

It is a super-2 number, since 2×55121123415² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121123417) 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, 483714 + ... + 586703.

It is an arithmetic number, because the mean of its divisors is an integer number (5513723118).

Almost surely, 2^55121123415 is an apocalyptic number.

55121123415 is a deficient number, since it is larger than the sum of its proper divisors (33098446473).

55121123415 is a wasteful number, since it uses less digits than its factorization.

55121123415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073858.

The product of its digits is 6000, while the sum is 30.

The spelling of 55121123415 in words is "fifty-five billion, one hundred twenty-one million, one hundred twenty-three thousand, four hundred fifteen".