51212733 has 64 divisors (see below), whose sum is σ = 86661120. Its totient is φ = 26438400.

The previous prime is 51212717. The next prime is 51212779. The reversal of 51212733 is 33721215.

It is not a de Polignac number, because 51212733 - 2⁴ = 51212717 is a prime.

Its product of digits (1260) is a multiple of the sum of its prime divisors (210).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51212783) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 497160 + ... + 497262.

It is an arithmetic number, because the mean of its divisors is an integer number (1354080).

Almost surely, 2^51212733 is an apocalyptic number.

It is an amenable number.

51212733 is a deficient number, since it is larger than the sum of its proper divisors (35448387).

51212733 is a wasteful number, since it uses less digits than its factorization.

51212733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its digits is 1260, while the sum is 24.

The square root of 51212733 is about 7156.3072181119. The cubic root of 51212733 is about 371.3578860911.

Adding to 51212733 its reverse (33721215), we get a palindrome (84933948).

The spelling of 51212733 in words is "fifty-one million, two hundred twelve thousand, seven hundred thirty-three".