215242232 has 8 divisors (see below), whose sum is σ = 403579200. Its totient is φ = 107621112.

The previous prime is 215242231. The next prime is 215242243. The reversal of 215242232 is 232242512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 215242198 and 215242207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215242231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13452632 + ... + 13452647.

It is an arithmetic number, because the mean of its divisors is an integer number (50447400).

Almost surely, 2^215242232 is an apocalyptic number.

It is an amenable number.

215242232 is a deficient number, since it is larger than the sum of its proper divisors (188336968).

215242232 is a wasteful number, since it uses less digits than its factorization.

215242232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26905285 (or 26905281 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 215242232 is about 14671.1360160009. The cubic root of 215242232 is about 599.2975408692.

Adding to 215242232 its reverse (232242512), we get a palindrome (447484744).

The spelling of 215242232 in words is "two hundred fifteen million, two hundred forty-two thousand, two hundred thirty-two".