51255223 has 4 divisors (see below), whose sum is σ = 51469920. Its totient is φ = 51040528.

The previous prime is 51255173. The next prime is 51255227. The reversal of 51255223 is 32255215.

It is a happy number.

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 51255223 - 2²¹ = 49158071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255227) 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, 106990 + ... + 107467.

It is an arithmetic number, because the mean of its divisors is an integer number (12867480).

Almost surely, 2^51255223 is an apocalyptic number.

51255223 is a deficient number, since it is larger than the sum of its proper divisors (214697).

51255223 is a wasteful number, since it uses less digits than its factorization.

51255223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214696.

The product of its digits is 3000, while the sum is 25.

The square root of 51255223 is about 7159.2753124880. The cubic root of 51255223 is about 371.4605600021.

The spelling of 51255223 in words is "fifty-one million, two hundred fifty-five thousand, two hundred twenty-three".