216090654 has 16 divisors (see below), whose sum is σ = 465426192. Its totient is φ = 66489408.

The previous prime is 216090649. The next prime is 216090661. The reversal of 216090654 is 456090612.

It is a super-2 number, since 2×216090654² = 93390341492295432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385119 + ... + 1385274.

It is an arithmetic number, because the mean of its divisors is an integer number (29089137).

Almost surely, 2^216090654 is an apocalyptic number.

216090654 is an abundant number, since it is smaller than the sum of its proper divisors (249335538).

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

216090654 is a wasteful number, since it uses less digits than its factorization.

216090654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770411.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 216090654 is about 14700.0222448811. The cubic root of 216090654 is about 600.0839271487.

The spelling of 216090654 in words is "two hundred sixteen million, ninety thousand, six hundred fifty-four".