510091 has 4 divisors (see below), whose sum is σ = 520992. Its totient is φ = 499192.

The previous prime is 510089. The next prime is 510101. The reversal of 510091 is 190015.

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

It is a cyclic number.

It is not a de Polignac number, because 510091 - 2¹ = 510089 is a prime.

It is a Duffinian number.

510091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (510031) 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, 5380 + ... + 5473.

It is an arithmetic number, because the mean of its divisors is an integer number (130248).

2⁵¹⁰⁰⁹¹ is an apocalyptic number.

510091 is a deficient number, since it is larger than the sum of its proper divisors (10901).

510091 is a wasteful number, since it uses less digits than its factorization.

510091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 510091 is about 714.2065527563. The cubic root of 510091 is about 79.9004490883.

The spelling of 510091 in words is "five hundred ten thousand, ninety-one".