511995 has 32 divisors (see below), whose sum is σ = 933120. Its totient is φ = 237440.

The previous prime is 511991. The next prime is 511997. The reversal of 511995 is 599115.

It is not a de Polignac number, because 511995 - 2² = 511991 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 511995.

It is not an unprimeable number, because it can be changed into a prime (511991) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4732 + ... + 4838.

It is an arithmetic number, because the mean of its divisors is an integer number (29160).

2⁵¹¹⁹⁹⁵ is an apocalyptic number.

511995 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

511995 is a deficient number, since it is larger than the sum of its proper divisors (421125).

511995 is a wasteful number, since it uses less digits than its factorization.

511995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155.

The product of its digits is 2025, while the sum is 30.

The square root of 511995 is about 715.5382589352. The cubic root of 511995 is about 79.9997395825. Note that the first 3 decimals are identical.

The spelling of 511995 in words is "five hundred eleven thousand, nine hundred ninety-five".