51722553 has 4 divisors (see below), whose sum is σ = 68963408. Its totient is φ = 34481700.

The previous prime is 51722543. The next prime is 51722557. The reversal of 51722553 is 35522715.

51722553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51722553 - 2⁴ = 51722537 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 51722553.

It is not an unprimeable number, because it can be changed into a prime (51722557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8620423 + ... + 8620428.

It is an arithmetic number, because the mean of its divisors is an integer number (17240852).

Almost surely, 2^51722553 is an apocalyptic number.

It is an amenable number.

51722553 is a deficient number, since it is larger than the sum of its proper divisors (17240855).

51722553 is a wasteful number, since it uses less digits than its factorization.

51722553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17240854.

The product of its digits is 10500, while the sum is 30.

The square root of 51722553 is about 7191.8393335780. The cubic root of 51722553 is about 372.5861020427.

The spelling of 51722553 in words is "fifty-one million, seven hundred twenty-two thousand, five hundred fifty-three".