51446647 has 6 divisors (see below), whose sum is σ = 58817864. Its totient is φ = 44080860.

The previous prime is 51446627. The next prime is 51446657. The reversal of 51446647 is 74664415.

It is not a de Polignac number, because 51446647 - 2¹¹ = 51444599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51446627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17622 + ... + 20332.

Almost surely, 2^51446647 is an apocalyptic number.

51446647 is a deficient number, since it is larger than the sum of its proper divisors (7371217).

51446647 is an frugal number, since it uses more digits than its factorization.

51446647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429 (or 2718 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 51446647 is about 7172.6318042961. The cubic root of 51446647 is about 371.9224194597.

The spelling of 51446647 in words is "fifty-one million, four hundred forty-six thousand, six hundred forty-seven".