51628523 has 4 divisors (see below), whose sum is σ = 51697128. Its totient is φ = 51559920.

The previous prime is 51628487. The next prime is 51628531. The reversal of 51628523 is 32582615.

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 51628523 - 2⁸ = 51628267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51628523.

It is not an unprimeable number, because it can be changed into a prime (51628543) 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, 33161 + ... + 34682.

It is an arithmetic number, because the mean of its divisors is an integer number (12924282).

Almost surely, 2^51628523 is an apocalyptic number.

51628523 is a deficient number, since it is larger than the sum of its proper divisors (68605).

51628523 is an equidigital number, since it uses as much as digits as its factorization.

51628523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68604.

The product of its digits is 14400, while the sum is 32.

The square root of 51628523 is about 7185.2990891124. The cubic root of 51628523 is about 372.3601817493.

The spelling of 51628523 in words is "fifty-one million, six hundred twenty-eight thousand, five hundred twenty-three".