515525989 has 4 divisors (see below), whose sum is σ = 562392000. Its totient is φ = 468659980.

The previous prime is 515525977. The next prime is 515526007. The reversal of 515525989 is 989525515.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 515525989 - 2⁷ = 515525861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515528989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23432989 + ... + 23433010.

It is an arithmetic number, because the mean of its divisors is an integer number (140598000).

Almost surely, 2^515525989 is an apocalyptic number.

It is an amenable number.

515525989 is a deficient number, since it is larger than the sum of its proper divisors (46866011).

515525989 is a wasteful number, since it uses less digits than its factorization.

515525989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46866010.

The product of its digits is 810000, while the sum is 49.

The square root of 515525989 is about 22705.1974005953. The cubic root of 515525989 is about 801.8322529618.

The spelling of 515525989 in words is "five hundred fifteen million, five hundred twenty-five thousand, nine hundred eighty-nine".