51185479 has 2 divisors, whose sum is σ = 51185480. Its totient is φ = 51185478.

The previous prime is 51185441. The next prime is 51185501. The reversal of 51185479 is 97458115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51185479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51185429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25592739 + 25592740.

It is an arithmetic number, because the mean of its divisors is an integer number (25592740).

Almost surely, 2^51185479 is an apocalyptic number.

51185479 is a deficient number, since it is larger than the sum of its proper divisors (1).

51185479 is an equidigital number, since it uses as much as digits as its factorization.

51185479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 51185479 is about 7154.4027703226. The cubic root of 51185479 is about 371.2919989368.

The spelling of 51185479 in words is "fifty-one million, one hundred eighty-five thousand, four hundred seventy-nine".