203021442 has 96 divisors (see below), whose sum is σ = 492972480. Its totient is φ = 59978880.

The previous prime is 203021417. The next prime is 203021453. The reversal of 203021442 is 244120302.

203021442 is a `hidden beast` number, since 203 + 0 + 21 + 442 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1134109 + ... + 1134287.

It is an arithmetic number, because the mean of its divisors is an integer number (5135130).

Almost surely, 2^203021442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203021442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246486240).

203021442 is an abundant number, since it is smaller than the sum of its proper divisors (289951038).

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

203021442 is a wasteful number, since it uses less digits than its factorization.

203021442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 203021442 is about 14248.5592955920. The cubic root of 203021442 is about 587.7337577107.

Adding to 203021442 its reverse (244120302), we get a palindrome (447141744).

The spelling of 203021442 in words is "two hundred three million, twenty-one thousand, four hundred forty-two".