51120973 has 12 divisors (see below), whose sum is σ = 54766908. Its totient is φ = 47685440.

The previous prime is 51120943. The next prime is 51121009. The reversal of 51120973 is 37902115.

It can be written as a sum of positive squares in 2 ways, for example, as 5396329 + 45724644 = 2323^2 + 6762^2 .

It is not a de Polignac number, because 51120973 - 2⁵ = 51120941 is a prime.

It is a super-2 number, since 2×51120973² = 5226707760933458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120943) 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 11 ways as a sum of consecutive naturals, for example, 20511 + ... + 22867.

It is an arithmetic number, because the mean of its divisors is an integer number (4563909).

Almost surely, 2^51120973 is an apocalyptic number.

It is an amenable number.

51120973 is a deficient number, since it is larger than the sum of its proper divisors (3645935).

51120973 is a wasteful number, since it uses less digits than its factorization.

51120973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 51120973 is about 7149.8932159858. The cubic root of 51120973 is about 371.1359609982.

The spelling of 51120973 in words is "fifty-one million, one hundred twenty thousand, nine hundred seventy-three".