204221142 has 16 divisors (see below), whose sum is σ = 453824880. Its totient is φ = 68073696.

The previous prime is 204221111. The next prime is 204221197. The reversal of 204221142 is 241122402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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, 1890883 + ... + 1890990.

It is an arithmetic number, because the mean of its divisors is an integer number (28364055).

Almost surely, 2^204221142 is an apocalyptic number.

204221142 is an abundant number, since it is smaller than the sum of its proper divisors (249603738).

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

204221142 is a wasteful number, since it uses less digits than its factorization.

204221142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781884 (or 3781878 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 204221142 is about 14290.5962786722. The cubic root of 204221142 is about 588.8891690966.

Adding to 204221142 its reverse (241122402), we get a palindrome (445343544).

The spelling of 204221142 in words is "two hundred four million, two hundred twenty-one thousand, one hundred forty-two".