51331293 has 64 divisors (see below), whose sum is σ = 88704000. Its totient is φ = 29066688.

The previous prime is 51331253. The next prime is 51331327. The reversal of 51331293 is 39213315.

It is a happy number.

51331293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51331293 - 2⁶ = 51331229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51331213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 286678 + ... + 286856.

It is an arithmetic number, because the mean of its divisors is an integer number (1386000).

Almost surely, 2^51331293 is an apocalyptic number.

It is an amenable number.

51331293 is a deficient number, since it is larger than the sum of its proper divisors (37372707).

51331293 is a wasteful number, since it uses less digits than its factorization.

51331293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 257 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 51331293 is about 7164.5860313070. The cubic root of 51331293 is about 371.6442358341.

The spelling of 51331293 in words is "fifty-one million, three hundred thirty-one thousand, two hundred ninety-three".