201981830 has 8 divisors (see below), whose sum is σ = 363567312. Its totient is φ = 80792728.

The previous prime is 201981823. The next prime is 201981841. The reversal of 201981830 is 38189102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10099082 + ... + 10099101.

It is an arithmetic number, because the mean of its divisors is an integer number (45445914).

Almost surely, 2^201981830 is an apocalyptic number.

201981830 is a deficient number, since it is larger than the sum of its proper divisors (161585482).

201981830 is a wasteful number, since it uses less digits than its factorization.

201981830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20198190.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 201981830 is about 14212.0311708074. The cubic root of 201981830 is about 586.7288376061.

The spelling of 201981830 in words is "two hundred one million, nine hundred eighty-one thousand, eight hundred thirty".