215420204 has 6 divisors (see below), whose sum is σ = 376985364. Its totient is φ = 107710100.

The previous prime is 215420201. The next prime is 215420213. The reversal of 215420204 is 402024512.

It is a happy number.

215420204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215420201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26927522 + ... + 26927529.

It is an arithmetic number, because the mean of its divisors is an integer number (62830894).

Almost surely, 2^215420204 is an apocalyptic number.

It is an amenable number.

215420204 is a deficient number, since it is larger than the sum of its proper divisors (161565160).

215420204 is a wasteful number, since it uses less digits than its factorization.

215420204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53855055 (or 53855053 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 215420204 is about 14677.2001417164. The cubic root of 215420204 is about 599.4626707910.

Adding to 215420204 its reverse (402024512), we get a palindrome (617444716).

The spelling of 215420204 in words is "two hundred fifteen million, four hundred twenty thousand, two hundred four".