203166642 has 48 divisors (see below), whose sum is σ = 479380032. Its totient is φ = 57224160.

The previous prime is 203166641. The next prime is 203166683. The reversal of 203166642 is 246661302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203166641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16008 + ... + 25740.

It is an arithmetic number, because the mean of its divisors is an integer number (9987084).

Almost surely, 2^203166642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203166642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239690016).

203166642 is an abundant number, since it is smaller than the sum of its proper divisors (276213390).

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

203166642 is a wasteful number, since it uses less digits than its factorization.

203166642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9823 (or 9816 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 203166642 is about 14253.6536368750. The cubic root of 203166642 is about 587.8738391461.

The spelling of 203166642 in words is "two hundred three million, one hundred sixty-six thousand, six hundred forty-two".