51167231 has 2 divisors, whose sum is σ = 51167232. Its totient is φ = 51167230.

The previous prime is 51167173. The next prime is 51167243. The reversal of 51167231 is 13276115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51167231 - 2¹⁸ = 50905087 is a prime.

It is a super-2 number, since 2×51167231² = 5236171056414722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51167231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51167261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25583615 + 25583616.

It is an arithmetic number, because the mean of its divisors is an integer number (25583616).

Almost surely, 2^51167231 is an apocalyptic number.

51167231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51167231 is an equidigital number, since it uses as much as digits as its factorization.

51167231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 51167231 is about 7153.1273580162. The cubic root of 51167231 is about 371.2478709155.

The spelling of 51167231 in words is "fifty-one million, one hundred sixty-seven thousand, two hundred thirty-one".