51542479 has 2 divisors, whose sum is σ = 51542480. Its totient is φ = 51542478.

The previous prime is 51542473. The next prime is 51542531. The reversal of 51542479 is 97424515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51542479 - 2⁹ = 51541967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51542473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25771239 + 25771240.

It is an arithmetic number, because the mean of its divisors is an integer number (25771240).

Almost surely, 2^51542479 is an apocalyptic number.

51542479 is a deficient number, since it is larger than the sum of its proper divisors (1).

51542479 is an equidigital number, since it uses as much as digits as its factorization.

51542479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 51542479 is about 7179.3090893205. The cubic root of 51542479 is about 372.1532084651.

The spelling of 51542479 in words is "fifty-one million, five hundred forty-two thousand, four hundred seventy-nine".