216526040 has 16 divisors (see below), whose sum is σ = 487183680. Its totient is φ = 86610400.

The previous prime is 216526031. The next prime is 216526069. The reversal of 216526040 is 40625612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2706536 + ... + 2706615.

It is an arithmetic number, because the mean of its divisors is an integer number (30448980).

Almost surely, 2^216526040 is an apocalyptic number.

216526040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216526040 is an abundant number, since it is smaller than the sum of its proper divisors (270657640).

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

216526040 is a wasteful number, since it uses less digits than its factorization.

216526040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413162 (or 5413158 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 216526040 is about 14714.8238181774. The cubic root of 216526040 is about 600.4866792063.

The spelling of 216526040 in words is "two hundred sixteen million, five hundred twenty-six thousand, forty".