215422464 has 40 divisors (see below), whose sum is σ = 573903000. Its totient is φ = 71806976.

The previous prime is 215422451. The next prime is 215422481. The reversal of 215422464 is 464224512.

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 3 ways as a sum of consecutive naturals, for example, 68589 + ... + 71660.

It is an arithmetic number, because the mean of its divisors is an integer number (14347575).

Almost surely, 2^215422464 is an apocalyptic number.

215422464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215422464 is an abundant number, since it is smaller than the sum of its proper divisors (358480536).

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

215422464 is an equidigital number, since it uses as much as digits as its factorization.

215422464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140270 (or 140254 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 215422464 is about 14677.2771316753. The cubic root of 215422464 is about 599.4647671294.

Adding to 215422464 its reverse (464224512), we get a palindrome (679646976).

The spelling of 215422464 in words is "two hundred fifteen million, four hundred twenty-two thousand, four hundred sixty-four".