51120971 has 4 divisors (see below), whose sum is σ = 55768344. Its totient is φ = 46473600.

The previous prime is 51120943. The next prime is 51121009. The reversal of 51120971 is 17902115.

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

It is a cyclic number.

It is not a de Polignac number, because 51120971 - 2¹⁰ = 51119947 is a prime.

It is a super-2 number, since 2×51120971² = 5226707351965682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51120971.

It is not an unprimeable number, because it can be changed into a prime (51120931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2323670 + ... + 2323691.

It is an arithmetic number, because the mean of its divisors is an integer number (13942086).

Almost surely, 2^51120971 is an apocalyptic number.

51120971 is a deficient number, since it is larger than the sum of its proper divisors (4647373).

51120971 is a wasteful number, since it uses less digits than its factorization.

51120971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4647372.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 51120971 is about 7149.8930761236. The cubic root of 51120971 is about 371.1359561582.

The spelling of 51120971 in words is "fifty-one million, one hundred twenty thousand, nine hundred seventy-one".