201597490 has 8 divisors (see below), whose sum is σ = 362875500. Its totient is φ = 80638992.

The previous prime is 201597481. The next prime is 201597491. The reversal of 201597490 is 94795102.

It can be written as a sum of positive squares in 2 ways, for example, as 168454441 + 33143049 = 12979^2 + 5757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (201597491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10079865 + ... + 10079884.

Almost surely, 2^201597490 is an apocalyptic number.

201597490 is a deficient number, since it is larger than the sum of its proper divisors (161278010).

201597490 is a wasteful number, since it uses less digits than its factorization.

201597490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20159756.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 201597490 is about 14198.5030901148. The cubic root of 201597490 is about 586.3564500743.

The spelling of 201597490 in words is "two hundred one million, five hundred ninety-seven thousand, four hundred ninety".