521213448 has 64 divisors (see below), whose sum is σ = 1517304960. Its totient is φ = 146105856.

The previous prime is 521213431. The next prime is 521213519. The reversal of 521213448 is 844312125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20365 + ... + 38172.

It is an arithmetic number, because the mean of its divisors is an integer number (23707890).

Almost surely, 2^521213448 is an apocalyptic number.

It is an amenable number.

521213448 is an abundant number, since it is smaller than the sum of its proper divisors (996091512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521213448 is a wasteful number, since it uses less digits than its factorization.

521213448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58606 (or 58602 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 521213448 is about 22830.0996055646. The cubic root of 521213448 is about 804.7701711347.

The spelling of 521213448 in words is "five hundred twenty-one million, two hundred thirteen thousand, four hundred forty-eight".