51253651 has 4 divisors (see below), whose sum is σ = 51483712. Its totient is φ = 51023592.

The previous prime is 51253627. The next prime is 51253667. The reversal of 51253651 is 15635215.

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 51253651 - 2²⁵ = 17699219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51253451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114696 + ... + 115141.

It is an arithmetic number, because the mean of its divisors is an integer number (12870928).

Almost surely, 2^51253651 is an apocalyptic number.

51253651 is a deficient number, since it is larger than the sum of its proper divisors (230061).

51253651 is a wasteful number, since it uses less digits than its factorization.

51253651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230060.

The product of its digits is 4500, while the sum is 28.

The square root of 51253651 is about 7159.1655239979. The cubic root of 51253651 is about 371.4567623925.

Adding to 51253651 its reverse (15635215), we get a palindrome (66888866).

The spelling of 51253651 in words is "fifty-one million, two hundred fifty-three thousand, six hundred fifty-one".