521229998 has 4 divisors (see below), whose sum is σ = 781845000. Its totient is φ = 260614998.

The previous prime is 521229967. The next prime is 521230019. The reversal of 521229998 is 899922125.

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

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, 130307498 + ... + 130307501.

It is an arithmetic number, because the mean of its divisors is an integer number (195461250).

Almost surely, 2^521229998 is an apocalyptic number.

521229998 is a deficient number, since it is larger than the sum of its proper divisors (260615002).

521229998 is a wasteful number, since it uses less digits than its factorization.

521229998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260615001.

The product of its digits is 233280, while the sum is 47.

The square root of 521229998 is about 22830.4620627792. The cubic root of 521229998 is about 804.7786889537.

The spelling of 521229998 in words is "five hundred twenty-one million, two hundred twenty-nine thousand, nine hundred ninety-eight".