215440032 has 24 divisors (see below), whose sum is σ = 565530336. Its totient is φ = 71813312.

The previous prime is 215440021. The next prime is 215440033. The reversal of 215440032 is 230044512.

215440032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×215440032² = 92828814776322048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215439990 and 215440008.

It is not an unprimeable number, because it can be changed into a prime (215440033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121988 + ... + 1122179.

It is an arithmetic number, because the mean of its divisors is an integer number (23563764).

Almost surely, 2^215440032 is an apocalyptic number.

It is an amenable number.

215440032 is an abundant number, since it is smaller than the sum of its proper divisors (350090304).

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

215440032 is a wasteful number, since it uses less digits than its factorization.

215440032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244180 (or 2244172 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 215440032 is about 14677.8755956031. The cubic root of 215440032 is about 599.4810624135.

Adding to 215440032 its reverse (230044512), we get a palindrome (445484544).

The spelling of 215440032 in words is "two hundred fifteen million, four hundred forty thousand, thirty-two".