521374885 has 4 divisors (see below), whose sum is σ = 625649868. Its totient is φ = 417099904.

The previous prime is 521374883. The next prime is 521374907. The reversal of 521374885 is 588473125.

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

It can be written as a sum of positive squares in 2 ways, for example, as 290395681 + 230979204 = 17041^2 + 15198^2 .

It is a cyclic number.

It is not a de Polignac number, because 521374885 - 2¹ = 521374883 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 (521374883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52137484 + ... + 52137493.

It is an arithmetic number, because the mean of its divisors is an integer number (156412467).

Almost surely, 2^521374885 is an apocalyptic number.

It is an amenable number.

521374885 is a deficient number, since it is larger than the sum of its proper divisors (104274983).

521374885 is a wasteful number, since it uses less digits than its factorization.

521374885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104274982.

The product of its digits is 268800, while the sum is 43.

The square root of 521374885 is about 22833.6349493461. The cubic root of 521374885 is about 804.8532505151.

The spelling of 521374885 in words is "five hundred twenty-one million, three hundred seventy-four thousand, eight hundred eighty-five".