203149830 has 96 divisors (see below), whose sum is σ = 559242144. Its totient is φ = 47044608.

The previous prime is 203149787. The next prime is 203149831. The reversal of 203149830 is 38941302.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203149831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85012 + ... + 87368.

It is an arithmetic number, because the mean of its divisors is an integer number (5825439).

Almost surely, 2^203149830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203149830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279621072).

203149830 is an abundant number, since it is smaller than the sum of its proper divisors (356092314).

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

203149830 is a wasteful number, since it uses less digits than its factorization.

203149830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 203149830 is about 14253.0638811450. The cubic root of 203149830 is about 587.8576232170.

The spelling of 203149830 in words is "two hundred three million, one hundred forty-nine thousand, eight hundred thirty".