215352420 has 48 divisors (see below), whose sum is σ = 610632960. Its totient is φ = 56699136.

The previous prime is 215352407. The next prime is 215352421. The reversal of 215352420 is 24253512.

It is not an unprimeable number, because it can be changed into a prime (215352421) 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 15 ways as a sum of consecutive naturals, for example, 17977 + ... + 27456.

It is an arithmetic number, because the mean of its divisors is an integer number (12721520).

Almost surely, 2^215352420 is an apocalyptic number.

215352420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215352420 is an abundant number, since it is smaller than the sum of its proper divisors (395280540).

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

215352420 is a wasteful number, since it uses less digits than its factorization.

215352420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45524 (or 45522 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 215352420 is about 14674.8908002751. The cubic root of 215352420 is about 599.3997886664.

The spelling of 215352420 in words is "two hundred fifteen million, three hundred fifty-two thousand, four hundred twenty".