51493423 has 2 divisors, whose sum is σ = 51493424. Its totient is φ = 51493422.

The previous prime is 51493399. The next prime is 51493427. The reversal of 51493423 is 32439415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51493423 - 2¹⁷ = 51362351 is a prime.

It is a super-2 number, since 2×51493423² = 5303145224513858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51493427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25746711 + 25746712.

It is an arithmetic number, because the mean of its divisors is an integer number (25746712).

Almost surely, 2^51493423 is an apocalyptic number.

51493423 is a deficient number, since it is larger than the sum of its proper divisors (1).

51493423 is an equidigital number, since it uses as much as digits as its factorization.

51493423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 51493423 is about 7175.8917912689. The cubic root of 51493423 is about 372.0351043105.

The spelling of 51493423 in words is "fifty-one million, four hundred ninety-three thousand, four hundred twenty-three".