521283489 has 16 divisors (see below), whose sum is σ = 701080128. Its totient is φ = 344515392.

The previous prime is 521283479. The next prime is 521283509. The reversal of 521283489 is 984382125.

It is not a de Polignac number, because 521283489 - 2⁵ = 521283457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521283489.

It is not an unprimeable number, because it can be changed into a prime (521283479) 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, 261354 + ... + 263340.

It is an arithmetic number, because the mean of its divisors is an integer number (43817508).

Almost surely, 2^521283489 is an apocalyptic number.

It is an amenable number.

521283489 is a deficient number, since it is larger than the sum of its proper divisors (179796639).

521283489 is a wasteful number, since it uses less digits than its factorization.

521283489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704.

The product of its digits is 138240, while the sum is 42.

The square root of 521283489 is about 22831.6335158043. The cubic root of 521283489 is about 804.8062180320.

The spelling of 521283489 in words is "five hundred twenty-one million, two hundred eighty-three thousand, four hundred eighty-nine".