521080437 has 4 divisors (see below), whose sum is σ = 694773920. Its totient is φ = 347386956.

The previous prime is 521080409. The next prime is 521080463. The reversal of 521080437 is 734080125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 521080437 - 2¹⁴ = 521064053 is a prime.

It is a super-2 number, since 2×521080437² = 543049643648221938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521080237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86846737 + ... + 86846742.

It is an arithmetic number, because the mean of its divisors is an integer number (173693480).

Almost surely, 2^521080437 is an apocalyptic number.

It is an amenable number.

521080437 is a deficient number, since it is larger than the sum of its proper divisors (173693483).

521080437 is a wasteful number, since it uses less digits than its factorization.

521080437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173693482.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 521080437 is about 22827.1863574993. The cubic root of 521080437 is about 804.7017075698.

The spelling of 521080437 in words is "five hundred twenty-one million, eighty thousand, four hundred thirty-seven".