5731509 has 16 divisors (see below), whose sum is σ = 8921088. Its totient is φ = 3204912.

The previous prime is 5731487. The next prime is 5731519. The reversal of 5731509 is 9051375.

It is a happy number.

It is not a de Polignac number, because 5731509 - 2¹³ = 5723317 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5731519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1917 + ... + 3890.

It is an arithmetic number, because the mean of its divisors is an integer number (557568).

Almost surely, 2^5731509 is an apocalyptic number.

It is an amenable number.

5731509 is a deficient number, since it is larger than the sum of its proper divisors (3189579).

5731509 is a wasteful number, since it uses less digits than its factorization.

5731509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 5731509 is about 2394.0570168649. The cubic root of 5731509 is about 178.9601463452.

The spelling of 5731509 in words is "five million, seven hundred thirty-one thousand, five hundred nine".