203145222 has 32 divisors (see below), whose sum is σ = 465696000. Its totient is φ = 57871008.

The previous prime is 203145221. The next prime is 203145227. The reversal of 203145222 is 222541302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203145221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7729 + ... + 21587.

It is an arithmetic number, because the mean of its divisors is an integer number (14553000).

Almost surely, 2^203145222 is an apocalyptic number.

203145222 is an abundant number, since it is smaller than the sum of its proper divisors (262550778).

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

203145222 is a wasteful number, since it uses less digits than its factorization.

203145222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14220.

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

The square root of 203145222 is about 14252.9022307739. The cubic root of 203145222 is about 587.8531784378.

Adding to 203145222 its reverse (222541302), we get a palindrome (425686524).

The spelling of 203145222 in words is "two hundred three million, one hundred forty-five thousand, two hundred twenty-two".