215531242225250 has 64 divisors (see below), whose sum is σ = 461116638508032. Its totient is φ = 73895954616000.

The previous prime is 215531242225183. The next prime is 215531242225297. The reversal of 215531242225250 is 52522242135512.

It is a junction number, because it is equal to n+sod(n) for n = 215531242225198 and 215531242225207.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378469724 + ... + 379038776.

It is an arithmetic number, because the mean of its divisors is an integer number (7204947476688).

Almost surely, 2^{215531242225250} is an apocalyptic number.

215531242225250 is an abundant number, since it is smaller than the sum of its proper divisors (245585396282782).

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

215531242225250 is a wasteful number, since it uses less digits than its factorization.

215531242225250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785508 (or 785498 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 215531242225250 in words is "two hundred fifteen trillion, five hundred thirty-one billion, two hundred forty-two million, two hundred twenty-five thousand, two hundred fifty".