201157489 has 9 divisors (see below), whose sum is σ = 218021259. Its totient is φ = 185513640.

The previous prime is 201157477. The next prime is 201157507. The reversal of 201157489 is 984751102.

The square root of 201157489 is 14183.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 29757025 + 171400464 = 5455^2 + 13092^2 .

It is not a de Polignac number, because 201157489 - 2⁷ = 201157361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201157469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 183834 + ... + 184924.

Almost surely, 2^201157489 is an apocalyptic number.

201157489 is the 14183-rd square number.

201157489 is the 7092-nd centered octagonal number.

It is an amenable number.

201157489 is a deficient number, since it is larger than the sum of its proper divisors (16863770).

201157489 is an frugal number, since it uses more digits than its factorization.

201157489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The cubic root of 201157489 is about 585.9295509900.

The spelling of 201157489 in words is "two hundred one million, one hundred fifty-seven thousand, four hundred eighty-nine".