201981263 has 8 divisors (see below), whose sum is σ = 220650240. Its totient is φ = 183363480.

The previous prime is 201981253. The next prime is 201981281. The reversal of 201981263 is 362189102.

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

It is a cyclic number.

It is not a de Polignac number, because 201981263 - 2⁸ = 201981007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201981203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295 + ... + 20552.

It is an arithmetic number, because the mean of its divisors is an integer number (27581280).

Almost surely, 2^201981263 is an apocalyptic number.

201981263 is a deficient number, since it is larger than the sum of its proper divisors (18668977).

201981263 is a wasteful number, since it uses less digits than its factorization.

201981263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25597.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 201981263 is about 14212.0112229058. The cubic root of 201981263 is about 586.7282885871.

The spelling of 201981263 in words is "two hundred one million, nine hundred eighty-one thousand, two hundred sixty-three".