511808481 has 12 divisors (see below), whose sum is σ = 763127040. Its totient is φ = 330198840.

The previous prime is 511808449. The next prime is 511808497. The reversal of 511808481 is 184808115.

It is a happy number.

It is not a de Polignac number, because 511808481 - 2⁵ = 511808449 is a prime.

It is a super-2 number, since 2×511808481² = 523895842447054722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511808411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916941 + ... + 917498.

It is an arithmetic number, because the mean of its divisors is an integer number (63593920).

Almost surely, 2^511808481 is an apocalyptic number.

It is an amenable number.

511808481 is a deficient number, since it is larger than the sum of its proper divisors (251318559).

511808481 is a wasteful number, since it uses less digits than its factorization.

511808481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834476 (or 1834473 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 511808481 is about 22623.1845901500. The cubic root of 511808481 is about 799.9002380808.

The spelling of 511808481 in words is "five hundred eleven million, eight hundred eight thousand, four hundred eighty-one".