51120705 has 16 divisors (see below), whose sum is σ = 84432384. Its totient is φ = 26384640.

The previous prime is 51120701. The next prime is 51120731. The reversal of 51120705 is 50702115.

It is not a de Polignac number, because 51120705 - 2² = 51120701 is a prime.

It is a super-2 number, since 2×51120705² = 5226652959394050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51120701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54504 + ... + 55433.

It is an arithmetic number, because the mean of its divisors is an integer number (5277024).

Almost surely, 2^51120705 is an apocalyptic number.

It is an amenable number.

51120705 is a deficient number, since it is larger than the sum of its proper divisors (33311679).

51120705 is a wasteful number, since it uses less digits than its factorization.

51120705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109976.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51120705 is about 7149.8744744226. The cubic root of 51120705 is about 371.1353124411.

The spelling of 51120705 in words is "fifty-one million, one hundred twenty thousand, seven hundred five".