51287733 has 24 divisors (see below), whose sum is σ = 87399936. Its totient is φ = 28360800.

The previous prime is 51287711. The next prime is 51287741. The reversal of 51287733 is 33778215.

It is not a de Polignac number, because 51287733 - 2⁵ = 51287701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51287233) 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, 11178 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (3641664).

Almost surely, 2^51287733 is an apocalyptic number.

It is an amenable number.

51287733 is a deficient number, since it is larger than the sum of its proper divisors (36112203).

51287733 is a wasteful number, since it uses less digits than its factorization.

51287733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26305 (or 26302 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 51287733 is about 7161.5454337734. The cubic root of 51287733 is about 371.5390796780.

The spelling of 51287733 in words is "fifty-one million, two hundred eighty-seven thousand, seven hundred thirty-three".