51212022 has 8 divisors (see below), whose sum is σ = 102424056. Its totient is φ = 17070672.

The previous prime is 51212009. The next prime is 51212027. The reversal of 51212022 is 22021215.

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

51212022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 51211992 and 51212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51212027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4267663 + ... + 4267674.

It is an arithmetic number, because the mean of its divisors is an integer number (12803007).

Almost surely, 2^51212022 is an apocalyptic number.

51212022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51212022 is a wasteful number, since it uses less digits than its factorization.

51212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535342.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51212022 is about 7156.2575414807. The cubic root of 51212022 is about 371.3561675297.

Adding to 51212022 its reverse (22021215), we get a palindrome (73233237).

The spelling of 51212022 in words is "fifty-one million, two hundred twelve thousand, twenty-two".