515951 has 2 divisors, whose sum is σ = 515952. Its totient is φ = 515950.

The previous prime is 515941. The next prime is 515969. The reversal of 515951 is 159515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515951 - 2⁶ = 515887 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 515951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257975 + 257976.

It is an arithmetic number, because the mean of its divisors is an integer number (257976).

2⁵¹⁵⁹⁵¹ is an apocalyptic number.

515951 is a deficient number, since it is larger than the sum of its proper divisors (1).

515951 is an equidigital number, since it uses as much as digits as its factorization.

515951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1125, while the sum is 26.

The square root of 515951 is about 718.2972922126. The cubic root of 515951 is about 80.2052541836.

The spelling of 515951 in words is "five hundred fifteen thousand, nine hundred fifty-one".