215245323545 has 48 divisors (see below), whose sum is σ = 307073099520. Its totient is φ = 144355083264.

The previous prime is 215245323511. The next prime is 215245323547. The reversal of 215245323545 is 545323542512.

It is not a de Polignac number, because 215245323545 - 2⁸ = 215245323289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215245323547) 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, 18729161 + ... + 18740649.

It is an arithmetic number, because the mean of its divisors is an integer number (6397356240).

Almost surely, 2^215245323545 is an apocalyptic number.

It is an amenable number.

215245323545 is a deficient number, since it is larger than the sum of its proper divisors (91827775975).

215245323545 is a wasteful number, since it uses less digits than its factorization.

215245323545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13182 (or 13175 counting only the distinct ones).

The product of its digits is 720000, while the sum is 41.

The spelling of 215245323545 in words is "two hundred fifteen billion, two hundred forty-five million, three hundred twenty-three thousand, five hundred forty-five".