201770731 has 8 divisors (see below), whose sum is σ = 208100160. Its totient is φ = 195487488.

The previous prime is 201770729. The next prime is 201770741. The reversal of 201770731 is 137077102.

201770731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201770731 - 2¹ = 201770729 is a prime.

It is a super-2 number, since 2×201770731² = 81422855776548722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201770731.

It is not an unprimeable number, because it can be changed into a prime (201770741) 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, 2566 + ... + 20251.

It is an arithmetic number, because the mean of its divisors is an integer number (26012520).

Almost surely, 2^201770731 is an apocalyptic number.

201770731 is a deficient number, since it is larger than the sum of its proper divisors (6329429).

201770731 is a wasteful number, since it uses less digits than its factorization.

201770731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23093.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 201770731 is about 14204.6024583583. The cubic root of 201770731 is about 586.5243620426.

The spelling of 201770731 in words is "two hundred one million, seven hundred seventy thousand, seven hundred thirty-one".