520331998 has 4 divisors (see below), whose sum is σ = 780498000. Its totient is φ = 260165998.

The previous prime is 520331951. The next prime is 520332017. The reversal of 520331998 is 899133025.

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

It is a self number, because there is not a number n which added to its sum of digits gives 520331998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130082998 + ... + 130083001.

It is an arithmetic number, because the mean of its divisors is an integer number (195124500).

Almost surely, 2^520331998 is an apocalyptic number.

520331998 is a deficient number, since it is larger than the sum of its proper divisors (260166002).

520331998 is a wasteful number, since it uses less digits than its factorization.

520331998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260166001.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 520331998 is about 22810.7868781417. The cubic root of 520331998 is about 804.3162528620.

The spelling of 520331998 in words is "five hundred twenty million, three hundred thirty-one thousand, nine hundred ninety-eight".