51125243 has 8 divisors (see below), whose sum is σ = 55340208. Its totient is φ = 46950624.

The previous prime is 51125201. The next prime is 51125279. The reversal of 51125243 is 34252115.

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

It is a cyclic number.

It is not a de Polignac number, because 51125243 - 2¹⁴ = 51108859 is a prime.

It is a super-2 number, since 2×51125243² = 5227580943618098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51125743) 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, 7421 + ... + 12542.

It is an arithmetic number, because the mean of its divisors is an integer number (6917526).

Almost surely, 2^51125243 is an apocalyptic number.

51125243 is a deficient number, since it is larger than the sum of its proper divisors (4214965).

51125243 is a wasteful number, since it uses less digits than its factorization.

51125243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20173.

The product of its digits is 1200, while the sum is 23.

The square root of 51125243 is about 7150.1918156089. The cubic root of 51125243 is about 371.1462940463.

Adding to 51125243 its reverse (34252115), we get a palindrome (85377358).

The spelling of 51125243 in words is "fifty-one million, one hundred twenty-five thousand, two hundred forty-three".