51822945 has 48 divisors (see below), whose sum is σ = 92664000. Its totient is φ = 26782080.

The previous prime is 51822943. The next prime is 51822949. The reversal of 51822945 is 54922815.

It is not a de Polignac number, because 51822945 - 2¹ = 51822943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51822943) 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 47 ways as a sum of consecutive naturals, for example, 347731 + ... + 347879.

It is an arithmetic number, because the mean of its divisors is an integer number (1930500).

Almost surely, 2^51822945 is an apocalyptic number.

It is an amenable number.

51822945 is a deficient number, since it is larger than the sum of its proper divisors (40841055).

51822945 is a wasteful number, since it uses less digits than its factorization.

51822945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 347 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 51822945 is about 7198.8155275712. The cubic root of 51822945 is about 372.8270059128.

The spelling of 51822945 in words is "fifty-one million, eight hundred twenty-two thousand, nine hundred forty-five".