51120017 has 4 divisors (see below), whose sum is σ = 55052340. Its totient is φ = 47187696.

The previous prime is 51119987. The next prime is 51120029. The reversal of 51120017 is 71002115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31013761 + 20106256 = 5569^2 + 4484^2 .

It is a cyclic number.

It is not a de Polignac number, because 51120017 - 2¹⁶ = 51054481 is a prime.

It is a super-2 number, since 2×51120017² = 5226512276160578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51119977 and 51120004.

It is not an unprimeable number, because it can be changed into a prime (51120217) 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, 1966142 + ... + 1966167.

It is an arithmetic number, because the mean of its divisors is an integer number (13763085).

Almost surely, 2^51120017 is an apocalyptic number.

It is an amenable number.

51120017 is a deficient number, since it is larger than the sum of its proper divisors (3932323).

51120017 is a wasteful number, since it uses less digits than its factorization.

51120017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932322.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 51120017 is about 7149.8263615279. The cubic root of 51120017 is about 371.1336474781.

The spelling of 51120017 in words is "fifty-one million, one hundred twenty thousand, seventeen".