201771157 has 16 divisors (see below), whose sum is σ = 248389632. Its totient is φ = 160086960.

The previous prime is 201771151. The next prime is 201771161. The reversal of 201771157 is 751177102.

It is a cyclic number.

It is not a de Polignac number, because 201771157 - 2⁷ = 201771029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201771151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15223 + ... + 25204.

It is an arithmetic number, because the mean of its divisors is an integer number (15524352).

Almost surely, 2^201771157 is an apocalyptic number.

It is an amenable number.

201771157 is a deficient number, since it is larger than the sum of its proper divisors (46618475).

201771157 is a wasteful number, since it uses less digits than its factorization.

201771157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40488.

The product of its (nonzero) digits is 3430, while the sum is 31.

The square root of 201771157 is about 14204.6174534903. The cubic root of 201771157 is about 586.5247748200.

The spelling of 201771157 in words is "two hundred one million, seven hundred seventy-one thousand, one hundred fifty-seven".