521081474 has 4 divisors (see below), whose sum is σ = 781622214. Its totient is φ = 260540736.

The previous prime is 521081453. The next prime is 521081543. The reversal of 521081474 is 474180125.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 518700625 + 2380849 = 22775^2 + 1543^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 521081474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130270367 + ... + 130270370.

Almost surely, 2^521081474 is an apocalyptic number.

521081474 is a deficient number, since it is larger than the sum of its proper divisors (260540740).

521081474 is a wasteful number, since it uses less digits than its factorization.

521081474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260540739.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 521081474 is about 22827.2090716320. The cubic root of 521081474 is about 804.7022413806.

The spelling of 521081474 in words is "five hundred twenty-one million, eighty-one thousand, four hundred seventy-four".