51272651 has 4 divisors (see below), whose sum is σ = 51315600. Its totient is φ = 51229704.

The previous prime is 51272597. The next prime is 51272653. The reversal of 51272651 is 15627215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51272651 - 2⁶ = 51272587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51272653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19631 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (12828900).

Almost surely, 2^51272651 is an apocalyptic number.

51272651 is a deficient number, since it is larger than the sum of its proper divisors (42949).

51272651 is a wasteful number, since it uses less digits than its factorization.

51272651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42948.

The product of its digits is 4200, while the sum is 29.

The square root of 51272651 is about 7160.4923713387. The cubic root of 51272651 is about 371.5026570519.

Adding to 51272651 its reverse (15627215), we get a palindrome (66899866).

The spelling of 51272651 in words is "fifty-one million, two hundred seventy-two thousand, six hundred fifty-one".