51447429 has 24 divisors (see below), whose sum is σ = 81993600. Its totient is φ = 30824640.

The previous prime is 51447391. The next prime is 51447437. The reversal of 51447429 is 92474415.

It is a happy number.

It is not a de Polignac number, because 51447429 - 2⁹ = 51446917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51447393 and 51447402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51447449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5892 + ... + 11730.

It is an arithmetic number, because the mean of its divisors is an integer number (3416400).

Almost surely, 2^51447429 is an apocalyptic number.

It is an amenable number.

51447429 is a deficient number, since it is larger than the sum of its proper divisors (30546171).

51447429 is a wasteful number, since it uses less digits than its factorization.

51447429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945 (or 5942 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51447429 is about 7172.6863168551. The cubic root of 51447429 is about 371.9243038835.

The spelling of 51447429 in words is "fifty-one million, four hundred forty-seven thousand, four hundred twenty-nine".