216361626 has 64 divisors (see below), whose sum is σ = 498086400. Its totient is φ = 62099136.

The previous prime is 216361609. The next prime is 216361631. The reversal of 216361626 is 626163612.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98205 + ... + 100383.

It is an arithmetic number, because the mean of its divisors is an integer number (7782600).

Almost surely, 2^216361626 is an apocalyptic number.

216361626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 216361626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249043200).

216361626 is an abundant number, since it is smaller than the sum of its proper divisors (281724774).

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

216361626 is a wasteful number, since it uses less digits than its factorization.

216361626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283.

The product of its digits is 15552, while the sum is 33.

The square root of 216361626 is about 14709.2360780565. The cubic root of 216361626 is about 600.3346522007.

The spelling of 216361626 in words is "two hundred sixteen million, three hundred sixty-one thousand, six hundred twenty-six".