201971972 has 24 divisors (see below), whose sum is σ = 365057280. Its totient is φ = 97718720.

The previous prime is 201971963. The next prime is 201971999. The reversal of 201971972 is 279179102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10697 + ... + 22767.

It is an arithmetic number, because the mean of its divisors is an integer number (15210720).

Almost surely, 2^201971972 is an apocalyptic number.

It is an amenable number.

201971972 is a deficient number, since it is larger than the sum of its proper divisors (163085308).

201971972 is a wasteful number, since it uses less digits than its factorization.

201971972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12211 (or 12209 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 201971972 is about 14211.6843477471. The cubic root of 201971972 is about 586.7192920825.

The spelling of 201971972 in words is "two hundred one million, nine hundred seventy-one thousand, nine hundred seventy-two".