201580249 has 4 divisors (see below), whose sum is σ = 217086436. Its totient is φ = 186074064.

The previous prime is 201580219. The next prime is 201580279. The reversal of 201580249 is 942085102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (201580219) and next prime (201580279).

It can be written as a sum of positive squares in 2 ways, for example, as 46826649 + 154753600 = 6843^2 + 12440^2 .

It is a cyclic number.

It is not a de Polignac number, because 201580249 - 2¹⁹ = 201055961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201580249.

It is not an unprimeable number, because it can be changed into a prime (201580219) 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, 7753074 + ... + 7753099.

It is an arithmetic number, because the mean of its divisors is an integer number (54271609).

Almost surely, 2^201580249 is an apocalyptic number.

It is an amenable number.

201580249 is a deficient number, since it is larger than the sum of its proper divisors (15506187).

201580249 is a wasteful number, since it uses less digits than its factorization.

201580249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15506186.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 201580249 is about 14197.8959356660. The cubic root of 201580249 is about 586.3397341589.

The spelling of 201580249 in words is "two hundred one million, five hundred eighty thousand, two hundred forty-nine".