51982251 has 8 divisors (see below), whose sum is σ = 69348240. Its totient is φ = 34635552.

The previous prime is 51982223. The next prime is 51982253. The reversal of 51982251 is 15228915.

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

It is not a de Polignac number, because 51982251 - 2¹⁸ = 51720107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51982253) 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, 3541 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (8668530).

Almost surely, 2^51982251 is an apocalyptic number.

51982251 is a deficient number, since it is larger than the sum of its proper divisors (17365989).

51982251 is a wasteful number, since it uses less digits than its factorization.

51982251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9645.

The product of its digits is 7200, while the sum is 33.

The square root of 51982251 is about 7209.8717741719. The cubic root of 51982251 is about 373.2086439642.

The spelling of 51982251 in words is "fifty-one million, nine hundred eighty-two thousand, two hundred fifty-one".