51451559 has 2 divisors, whose sum is σ = 51451560. Its totient is φ = 51451558.

The previous prime is 51451549. The next prime is 51451567. The reversal of 51451559 is 95515415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51451559 - 2⁸ = 51451303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51451549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725779 + 25725780.

It is an arithmetic number, because the mean of its divisors is an integer number (25725780).

Almost surely, 2^51451559 is an apocalyptic number.

51451559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451559 is an equidigital number, since it uses as much as digits as its factorization.

51451559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22500, while the sum is 35.

The square root of 51451559 is about 7172.9742087923. The cubic root of 51451559 is about 371.9342558306.

The spelling of 51451559 in words is "fifty-one million, four hundred fifty-one thousand, five hundred fifty-nine".