51288645 has 8 divisors (see below), whose sum is σ = 82061856. Its totient is φ = 27353936.

The previous prime is 51288613. The next prime is 51288649. The reversal of 51288645 is 54688215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51288645 - 2⁵ = 51288613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51288649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709607 + ... + 1709636.

It is an arithmetic number, because the mean of its divisors is an integer number (10257732).

Almost surely, 2^51288645 is an apocalyptic number.

It is an amenable number.

51288645 is a deficient number, since it is larger than the sum of its proper divisors (30773211).

51288645 is a wasteful number, since it uses less digits than its factorization.

51288645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419251.

The product of its digits is 76800, while the sum is 39.

The square root of 51288645 is about 7161.6091068977. The cubic root of 51288645 is about 371.5412819046.

The spelling of 51288645 in words is "fifty-one million, two hundred eighty-eight thousand, six hundred forty-five".