51165722 has 8 divisors (see below), whose sum is σ = 77428116. Its totient is φ = 25356352.

The previous prime is 51165721. The next prime is 51165739. The reversal of 51165722 is 22756115.

It can be written as a sum of positive squares in 2 ways, for example, as 37319881 + 13845841 = 6109^2 + 3721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51165722² = 5235862215562568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51165721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112973 + ... + 113424.

Almost surely, 2^51165722 is an apocalyptic number.

51165722 is a deficient number, since it is larger than the sum of its proper divisors (26262394).

51165722 is a wasteful number, since it uses less digits than its factorization.

51165722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226512.

The product of its digits is 4200, while the sum is 29.

The square root of 51165722 is about 7153.0218788985. The cubic root of 51165722 is about 371.2442213236.

The spelling of 51165722 in words is "fifty-one million, one hundred sixty-five thousand, seven hundred twenty-two".