51515702205 has 48 divisors (see below), whose sum is σ = 92135292480. Its totient is φ = 24553914880.

The previous prime is 51515702141. The next prime is 51515702207. The reversal of 51515702205 is 50220751515.

It is not a de Polignac number, because 51515702205 - 2⁶ = 51515702141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515702207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133452 + ... + 347621.

It is an arithmetic number, because the mean of its divisors is an integer number (1919485260).

Almost surely, 2^51515702205 is an apocalyptic number.

51515702205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51515702205 is a deficient number, since it is larger than the sum of its proper divisors (40619590275).

51515702205 is a wasteful number, since it uses less digits than its factorization.

51515702205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481162 (or 481151 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 33.

The spelling of 51515702205 in words is "fifty-one billion, five hundred fifteen million, seven hundred two thousand, two hundred five".