201771256 has 8 divisors (see below), whose sum is σ = 378321120. Its totient is φ = 100885624.

The previous prime is 201771247. The next prime is 201771259. The reversal of 201771256 is 652177102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201771259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610696 + ... + 12610711.

It is an arithmetic number, because the mean of its divisors is an integer number (47290140).

Almost surely, 2^201771256 is an apocalyptic number.

It is an amenable number.

201771256 is a deficient number, since it is larger than the sum of its proper divisors (176549864).

201771256 is a wasteful number, since it uses less digits than its factorization.

201771256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25221413 (or 25221409 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 201771256 is about 14204.6209382722. The cubic root of 201771256 is about 586.5248707471.

The spelling of 201771256 in words is "two hundred one million, seven hundred seventy-one thousand, two hundred fifty-six".