51494291 has 2 divisors, whose sum is σ = 51494292. Its totient is φ = 51494290.

The previous prime is 51494239. The next prime is 51494299. The reversal of 51494291 is 19249415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51494291 - 2¹⁸ = 51232147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51494299) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25747145 + 25747146.

It is an arithmetic number, because the mean of its divisors is an integer number (25747146).

Almost surely, 2^51494291 is an apocalyptic number.

51494291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51494291 is an equidigital number, since it uses as much as digits as its factorization.

51494291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 51494291 is about 7175.9522713017. The cubic root of 51494291 is about 372.0371947046.

The spelling of 51494291 in words is "fifty-one million, four hundred ninety-four thousand, two hundred ninety-one".