51722772 has 24 divisors (see below), whose sum is σ = 127786176. Its totient is φ = 16226688.

The previous prime is 51722761. The next prime is 51722777. The reversal of 51722772 is 27722715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51722777) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 126568 + ... + 126975.

It is an arithmetic number, because the mean of its divisors is an integer number (5324424).

Almost surely, 2^51722772 is an apocalyptic number.

It is an amenable number.

51722772 is an abundant number, since it is smaller than the sum of its proper divisors (76063404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51722772 is a wasteful number, since it uses less digits than its factorization.

51722772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253567 (or 253565 counting only the distinct ones).

The product of its digits is 13720, while the sum is 33.

The square root of 51722772 is about 7191.8545591523. The cubic root of 51722772 is about 372.5866279013.

The spelling of 51722772 in words is "fifty-one million, seven hundred twenty-two thousand, seven hundred seventy-two".