201745157 has 8 divisors (see below), whose sum is σ = 204910200. Its totient is φ = 198604224.

The previous prime is 201745153. The next prime is 201745163. The reversal of 201745157 is 751547102.

It can be written as a sum of positive squares in 4 ways, for example, as 1267876 + 200477281 = 1126^2 + 14159^2 .

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 201745157 - 2² = 201745153 is a prime.

It is a super-2 number, since 2×201745157² = 81402216745909298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201745153) 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, 11219 + ... + 23007.

It is an arithmetic number, because the mean of its divisors is an integer number (25613775).

Almost surely, 2^201745157 is an apocalyptic number.

It is an amenable number.

201745157 is a deficient number, since it is larger than the sum of its proper divisors (3165043).

201745157 is a wasteful number, since it uses less digits than its factorization.

201745157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12055.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 201745157 is about 14203.7022286445. The cubic root of 201745157 is about 586.4995807678.

It can be divided in two parts, 2017 and 45157, that added together give a palindrome (47174).

The spelling of 201745157 in words is "two hundred one million, seven hundred forty-five thousand, one hundred fifty-seven".