215245551290 has 64 divisors (see below), whose sum is σ = 504046540800. Its totient is φ = 64172581440.

The previous prime is 215245551253. The next prime is 215245551299. The reversal of 215245551290 is 92155542512.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215245551299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6059240 + ... + 6094659.

It is an arithmetic number, because the mean of its divisors is an integer number (7875727200).

Almost surely, 2^215245551290 is an apocalyptic number.

215245551290 is an abundant number, since it is smaller than the sum of its proper divisors (288800989510).

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

215245551290 is a wasteful number, since it uses less digits than its factorization.

215245551290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12153947.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 215245551290 in words is "two hundred fifteen billion, two hundred forty-five million, five hundred fifty-one thousand, two hundred ninety".