215244822 has 48 divisors (see below), whose sum is σ = 472227840. Its totient is φ = 65366496.

The previous prime is 215244817. The next prime is 215244823. The reversal of 215244822 is 228442512.

It is a super-3 number, since 3×215244822³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215244822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215244823) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 78763 + ... + 81449.

It is an arithmetic number, because the mean of its divisors is an integer number (9838080).

Almost surely, 2^215244822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215244822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236113920).

215244822 is an abundant number, since it is smaller than the sum of its proper divisors (256983018).

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

215244822 is a wasteful number, since it uses less digits than its factorization.

215244822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2784 counting only the distinct ones).

The product of its digits is 10240, while the sum is 30.

The square root of 215244822 is about 14671.2242842920. The cubic root of 215244822 is about 599.2999446329.

The spelling of 215244822 in words is "two hundred fifteen million, two hundred forty-four thousand, eight hundred twenty-two".