51451022 has 16 divisors (see below), whose sum is σ = 89867232. Its totient is φ = 21634080.

The previous prime is 51451021. The next prime is 51451039. The reversal of 51451022 is 22015415.

It is a junction number, because it is equal to n+sod(n) for n = 51450985 and 51451003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33929 + ... + 35412.

It is an arithmetic number, because the mean of its divisors is an integer number (5616702).

Almost surely, 2^51451022 is an apocalyptic number.

51451022 is a deficient number, since it is larger than the sum of its proper divisors (38416210).

51451022 is a wasteful number, since it uses less digits than its factorization.

51451022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69403.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51451022 is about 7172.9367765233. The cubic root of 51451022 is about 371.9329618667.

Adding to 51451022 its reverse (22015415), we get a palindrome (73466437).

The spelling of 51451022 in words is "fifty-one million, four hundred fifty-one thousand, twenty-two".