215100240520 has 64 divisors (see below), whose sum is σ = 528263648640. Its totient is φ = 78175257600.

The previous prime is 215100240503. The next prime is 215100240569. The reversal of 215100240520 is 25042001512.

215100240520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215100240520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 215100240491 and 215100240500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672144 + ... + 939136.

It is an arithmetic number, because the mean of its divisors is an integer number (8254119510).

Almost surely, 2^215100240520 is an apocalyptic number.

215100240520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215100240520 is an abundant number, since it is smaller than the sum of its proper divisors (313163408120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215100240520 is a wasteful number, since it uses less digits than its factorization.

215100240520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268846 (or 268842 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The spelling of 215100240520 in words is "two hundred fifteen billion, one hundred million, two hundred forty thousand, five hundred twenty".