51994293 has 16 divisors (see below), whose sum is σ = 75235776. Its totient is φ = 31749120.

The previous prime is 51994289. The next prime is 51994301. The reversal of 51994293 is 39249915.

It is not a de Polignac number, because 51994293 - 2² = 51994289 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51994253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21 + ... + 10197.

It is an arithmetic number, because the mean of its divisors is an integer number (4702236).

Almost surely, 2^51994293 is an apocalyptic number.

It is an amenable number.

51994293 is a deficient number, since it is larger than the sum of its proper divisors (23241483).

51994293 is a wasteful number, since it uses less digits than its factorization.

51994293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324.

The product of its digits is 87480, while the sum is 42.

The square root of 51994293 is about 7210.7068308176. The cubic root of 51994293 is about 373.2374604122.

The spelling of 51994293 in words is "fifty-one million, nine hundred ninety-four thousand, two hundred ninety-three".