511951 has 6 divisors (see below), whose sum is σ = 562856. Its totient is φ = 465300.

The previous prime is 511939. The next prime is 511961. The reversal of 511951 is 159115.

It is not a de Polignac number, because 511951 - 2⁹ = 511439 is a prime.

It is a Duffinian number.

511951 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1995 + ... + 2236.

2⁵¹¹⁹⁵¹ is an apocalyptic number.

511951 is a deficient number, since it is larger than the sum of its proper divisors (50905).

511951 is a wasteful number, since it uses less digits than its factorization.

511951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253 (or 4242 counting only the distinct ones).

The product of its digits is 225, while the sum is 22.

The square root of 511951 is about 715.5075121898. The cubic root of 511951 is about 79.9974478352.

Subtracting from 511951 its reverse (159115), we obtain a square (352836 = 594²).

It can be divided in two parts, 51 and 1951, that added together give a palindrome (2002).

The spelling of 511951 in words is "five hundred eleven thousand, nine hundred fifty-one".