51120071 has 16 divisors (see below), whose sum is σ = 56282688. Its totient is φ = 46233600.

The previous prime is 51120061. The next prime is 51120119. The reversal of 51120071 is 17002115.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51120071 is a prime.

It is a super-2 number, since 2×51120071² = 5226523318090082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120061) 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, 48971 + ... + 50003.

It is an arithmetic number, because the mean of its divisors is an integer number (3517668).

Almost surely, 2^51120071 is an apocalyptic number.

51120071 is a deficient number, since it is larger than the sum of its proper divisors (5162617).

51120071 is a wasteful number, since it uses less digits than its factorization.

51120071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

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

The square root of 51120071 is about 7149.8301378424. The cubic root of 51120071 is about 371.1337781589.

Adding to 51120071 its reverse (17002115), we get a palindrome (68122186).

The spelling of 51120071 in words is "fifty-one million, one hundred twenty thousand, seventy-one".