216955626 has 16 divisors (see below), whose sum is σ = 441266400. Its totient is φ = 71092688.

The previous prime is 216955621. The next prime is 216955681. The reversal of 216955626 is 626559612.

It is not an unprimeable number, because it can be changed into a prime (216955621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306081 + ... + 306788.

It is an arithmetic number, because the mean of its divisors is an integer number (27579150).

Almost surely, 2^216955626 is an apocalyptic number.

216955626 is an abundant number, since it is smaller than the sum of its proper divisors (224310774).

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

216955626 is a wasteful number, since it uses less digits than its factorization.

216955626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612933.

The product of its digits is 194400, while the sum is 42.

The square root of 216955626 is about 14729.4136339503. The cubic root of 216955626 is about 600.8835371870.

The spelling of 216955626 in words is "two hundred sixteen million, nine hundred fifty-five thousand, six hundred twenty-six".