51722444 has 12 divisors (see below), whose sum is σ = 90585768. Its totient is φ = 25840800.

The previous prime is 51722417. The next prime is 51722467. The reversal of 51722444 is 44422715.

It is a super-2 number, since 2×51722444² = 5350422426666272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559 + ... + 10289.

It is an arithmetic number, because the mean of its divisors is an integer number (7548814).

Almost surely, 2^51722444 is an apocalyptic number.

It is an amenable number.

51722444 is a deficient number, since it is larger than the sum of its proper divisors (38863324).

51722444 is a wasteful number, since it uses less digits than its factorization.

51722444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10216 (or 10214 counting only the distinct ones).

The product of its digits is 8960, while the sum is 29.

The square root of 51722444 is about 7191.8317555404. The cubic root of 51722444 is about 372.5858403135.

The spelling of 51722444 in words is "fifty-one million, seven hundred twenty-two thousand, four hundred forty-four".