215420232 has 32 divisors (see below), whose sum is σ = 551688480. Its totient is φ = 70055040.

The previous prime is 215420213. The next prime is 215420237. The reversal of 215420232 is 232024512.

It is a junction number, because it is equal to n+sod(n) for n = 215420199 and 215420208.

It is not an unprimeable number, because it can be changed into a prime (215420237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108478 + ... + 110445.

It is an arithmetic number, because the mean of its divisors is an integer number (17240265).

Almost surely, 2^215420232 is an apocalyptic number.

It is an amenable number.

215420232 is an abundant number, since it is smaller than the sum of its proper divisors (336268248).

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

215420232 is a wasteful number, since it uses less digits than its factorization.

215420232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218973 (or 218969 counting only the distinct ones).

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

The square root of 215420232 is about 14677.2010955768. The cubic root of 215420232 is about 599.4626967635.

Adding to 215420232 its reverse (232024512), we get a palindrome (447444744).

The spelling of 215420232 in words is "two hundred fifteen million, four hundred twenty thousand, two hundred thirty-two".