51724622 has 4 divisors (see below), whose sum is σ = 77586936. Its totient is φ = 25862310.

The previous prime is 51724609. The next prime is 51724633. The reversal of 51724622 is 22642715.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22642715 = 5 ⋅4528543.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12931154 + ... + 12931157.

It is an arithmetic number, because the mean of its divisors is an integer number (19396734).

Almost surely, 2^51724622 is an apocalyptic number.

51724622 is a deficient number, since it is larger than the sum of its proper divisors (25862314).

51724622 is a wasteful number, since it uses less digits than its factorization.

51724622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25862313.

The product of its digits is 6720, while the sum is 29.

The square root of 51724622 is about 7191.9831757312. The cubic root of 51724622 is about 372.5910700262.

The spelling of 51724622 in words is "fifty-one million, seven hundred twenty-four thousand, six hundred twenty-two".