51401447 has 2 divisors, whose sum is σ = 51401448. Its totient is φ = 51401446.

The previous prime is 51401443. The next prime is 51401459. The reversal of 51401447 is 74410415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51401447 - 2² = 51401443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51401443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25700723 + 25700724.

It is an arithmetic number, because the mean of its divisors is an integer number (25700724).

Almost surely, 2^51401447 is an apocalyptic number.

51401447 is a deficient number, since it is larger than the sum of its proper divisors (1).

51401447 is an equidigital number, since it uses as much as digits as its factorization.

51401447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 51401447 is about 7169.4802461545. The cubic root of 51401447 is about 371.8134663340.

The spelling of 51401447 in words is "fifty-one million, four hundred one thousand, four hundred forty-seven".