215430550 has 24 divisors (see below), whose sum is σ = 421792200. Its totient is φ = 81636480.

The previous prime is 215430503. The next prime is 215430583. The reversal of 215430550 is 55034512.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112435 + ... + 114334.

It is an arithmetic number, because the mean of its divisors is an integer number (17574675).

Almost surely, 2^215430550 is an apocalyptic number.

215430550 is a deficient number, since it is larger than the sum of its proper divisors (206361650).

215430550 is a wasteful number, since it uses less digits than its factorization.

215430550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226800 (or 226795 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 215430550 is about 14677.5525889026. The cubic root of 215430550 is about 599.4722674482.

The spelling of 215430550 in words is "two hundred fifteen million, four hundred thirty thousand, five hundred fifty".