51605722 has 16 divisors (see below), whose sum is σ = 90273600. Its totient is φ = 22116444.

The previous prime is 51605699. The next prime is 51605753. The reversal of 51605722 is 22750615.

51605722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 36928 + ... + 38299.

It is an arithmetic number, because the mean of its divisors is an integer number (5642100).

Almost surely, 2^51605722 is an apocalyptic number.

51605722 is a deficient number, since it is larger than the sum of its proper divisors (38667878).

51605722 is an equidigital number, since it uses as much as digits as its factorization.

51605722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75250 (or 75236 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 51605722 is about 7183.7122715209. The cubic root of 51605722 is about 372.3053578253.

The spelling of 51605722 in words is "fifty-one million, six hundred five thousand, seven hundred twenty-two".