215315345124 has 96 divisors (see below), whose sum is σ = 625431542400. Its totient is φ = 63483626880.

The previous prime is 215315345107. The next prime is 215315345143. The reversal of 215315345124 is 421543513512.

215315345124 is a `hidden beast` number, since 2 + 1 + 53 + 1 + 534 + 51 + 24 = 666.

215315345124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2405259 + ... + 2493170.

It is an arithmetic number, because the mean of its divisors is an integer number (6514911900).

Almost surely, 2^215315345124 is an apocalyptic number.

It is an amenable number.

215315345124 is an abundant number, since it is smaller than the sum of its proper divisors (410116197276).

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

215315345124 is a wasteful number, since it uses less digits than its factorization.

215315345124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4898490 (or 4898482 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

Adding to 215315345124 its reverse (421543513512), we get a palindrome (636858858636).

The spelling of 215315345124 in words is "two hundred fifteen billion, three hundred fifteen million, three hundred forty-five thousand, one hundred twenty-four".