215233616 has 40 divisors (see below), whose sum is σ = 451653384. Its totient is φ = 98772480.

The previous prime is 215233607. The next prime is 215233639. The reversal of 215233616 is 616332512.

It can be written as a sum of positive squares in 4 ways, for example, as 2190400 + 213043216 = 1480^2 + 14596^2 .

It is a congruent number.

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, 34790 + ... + 40506.

Almost surely, 2^215233616 is an apocalyptic number.

215233616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215233616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225826692).

215233616 is an abundant number, since it is smaller than the sum of its proper divisors (236419768).

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

215233616 is a wasteful number, since it uses less digits than its factorization.

215233616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919 (or 5913 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 215233616 is about 14670.8423752694. The cubic root of 215233616 is about 599.2895442717.

The spelling of 215233616 in words is "two hundred fifteen million, two hundred thirty-three thousand, six hundred sixteen".