51722446 has 48 divisors (see below), whose sum is σ = 89187840. Its totient is φ = 22405680.

The previous prime is 51722417. The next prime is 51722467. The reversal of 51722446 is 64422715.

51722446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51722446² = 5350422840445832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 623121 + ... + 623203.

It is an arithmetic number, because the mean of its divisors is an integer number (1858080).

Almost surely, 2^51722446 is an apocalyptic number.

51722446 is a deficient number, since it is larger than the sum of its proper divisors (37465394).

51722446 is a wasteful number, since it uses less digits than its factorization.

51722446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 158 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 51722446 is about 7191.8318945871. The cubic root of 51722446 is about 372.5858451159.

The spelling of 51722446 in words is "fifty-one million, seven hundred twenty-two thousand, four hundred forty-six".