201981022 has 4 divisors (see below), whose sum is σ = 302971536. Its totient is φ = 100990510.

The previous prime is 201981007. The next prime is 201981037. The reversal of 201981022 is 220189102.

201981022 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (201981007) and next prime (201981037).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50495254 + ... + 50495257.

It is an arithmetic number, because the mean of its divisors is an integer number (75742884).

Almost surely, 2^201981022 is an apocalyptic number.

201981022 is a deficient number, since it is larger than the sum of its proper divisors (100990514).

201981022 is a wasteful number, since it uses less digits than its factorization.

201981022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100990513.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 201981022 is about 14212.0027441596. The cubic root of 201981022 is about 586.7280552296.

The spelling of 201981022 in words is "two hundred one million, nine hundred eighty-one thousand, twenty-two".