215422672 has 40 divisors (see below), whose sum is σ = 435909600. Its totient is φ = 103001472.

The previous prime is 215422663. The next prime is 215422673. The reversal of 215422672 is 276224512.

215422672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215422672² = 92813855223239168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215422673) 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, 47479 + ... + 51817.

It is an arithmetic number, because the mean of its divisors is an integer number (10897740).

Almost surely, 2^215422672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215422672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217954800).

215422672 is an abundant number, since it is smaller than the sum of its proper divisors (220486928).

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

215422672 is a wasteful number, since it uses less digits than its factorization.

215422672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483 (or 4477 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 215422672 is about 14677.2842174566. The cubic root of 215422672 is about 599.4649600660.

The spelling of 215422672 in words is "two hundred fifteen million, four hundred twenty-two thousand, six hundred seventy-two".