216057026 has 16 divisors (see below), whose sum is σ = 338684544. Its totient is φ = 103269264.

The previous prime is 216057019. The next prime is 216057031. The reversal of 216057026 is 620750612.

It is a super-5 number, since 5×216057026⁵ (a number of 43 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216057026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22685 + ... + 30768.

It is an arithmetic number, because the mean of its divisors is an integer number (21167784).

Almost surely, 2^216057026 is an apocalyptic number.

216057026 is a deficient number, since it is larger than the sum of its proper divisors (122627518).

216057026 is a wasteful number, since it uses less digits than its factorization.

216057026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53545.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 216057026 is about 14698.8783925849. The cubic root of 216057026 is about 600.0527972058.

The spelling of 216057026 in words is "two hundred sixteen million, fifty-seven thousand, twenty-six".