55715105215 has 24 divisors (see below), whose sum is σ = 83987074080. Its totient is φ = 34731491520.

The previous prime is 55715105189. The next prime is 55715105219. The reversal of 55715105215 is 51250151755.

It is not a de Polignac number, because 55715105215 - 2¹³ = 55715097023 is a prime.

It is a super-3 number, since 3×55715105215³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55715105219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6573700 + ... + 6582169.

It is an arithmetic number, because the mean of its divisors is an integer number (3499461420).

Almost surely, 2^55715105215 is an apocalyptic number.

55715105215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55715105215 is a deficient number, since it is larger than the sum of its proper divisors (28271968865).

55715105215 is a wasteful number, since it uses less digits than its factorization.

55715105215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13155903 (or 13155892 counting only the distinct ones).

The product of its (nonzero) digits is 43750, while the sum is 37.

The spelling of 55715105215 in words is "fifty-five billion, seven hundred fifteen million, one hundred five thousand, two hundred fifteen".