51440971 has 8 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 50992512.

The previous prime is 51440953. The next prime is 51441001. The reversal of 51440971 is 17904415.

51440971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51440971 - 2²³ = 43052363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51440911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86451 + ... + 87043.

It is an arithmetic number, because the mean of its divisors is an integer number (6486480).

Almost surely, 2^51440971 is an apocalyptic number.

51440971 is a deficient number, since it is larger than the sum of its proper divisors (450869).

51440971 is a wasteful number, since it uses less digits than its factorization.

51440971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 51440971 is about 7172.2361227165. The cubic root of 51440971 is about 371.9087411515.

The spelling of 51440971 in words is "fifty-one million, four hundred forty thousand, nine hundred seventy-one".