215454090 has 32 divisors (see below), whose sum is σ = 547508160. Its totient is φ = 54074624.

The previous prime is 215454089. The next prime is 215454121. The reversal of 215454090 is 90454512.

215454090 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 (30).

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, 210720 + ... + 211739.

It is an arithmetic number, because the mean of its divisors is an integer number (17109630).

Almost surely, 2^215454090 is an apocalyptic number.

215454090 is an abundant number, since it is smaller than the sum of its proper divisors (332054070).

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

215454090 is a wasteful number, since it uses less digits than its factorization.

215454090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422486.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 215454090 is about 14678.3544718064. The cubic root of 215454090 is about 599.4941013419.

The spelling of 215454090 in words is "two hundred fifteen million, four hundred fifty-four thousand, ninety".