521848081 has 4 divisors (see below), whose sum is σ = 544537152. Its totient is φ = 499159012.

The previous prime is 521848049. The next prime is 521848139. The reversal of 521848081 is 180848125.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 521848081 - 2⁵ = 521848049 is a prime.

It is a super-2 number, since 2×521848081² = 544650839286765122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521848081.

It is not an unprimeable number, because it can be changed into a prime (521848001) 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, 11344501 + ... + 11344546.

It is an arithmetic number, because the mean of its divisors is an integer number (136134288).

Almost surely, 2^521848081 is an apocalyptic number.

It is an amenable number.

521848081 is a deficient number, since it is larger than the sum of its proper divisors (22689071).

521848081 is a wasteful number, since it uses less digits than its factorization.

521848081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22689070.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 521848081 is about 22843.9944186651. The cubic root of 521848081 is about 805.0966698460.

The spelling of 521848081 in words is "five hundred twenty-one million, eight hundred forty-eight thousand, eighty-one".