51212322 has 24 divisors (see below), whose sum is σ = 126811776. Its totient is φ = 14632056.

The previous prime is 51212311. The next prime is 51212327. The reversal of 51212322 is 22321215.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51212295 and 51212304.

It is not an unprimeable number, because it can be changed into a prime (51212327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203098 + ... + 203349.

It is an arithmetic number, because the mean of its divisors is an integer number (5283824).

Almost surely, 2^51212322 is an apocalyptic number.

51212322 is an abundant number, since it is smaller than the sum of its proper divisors (75599454).

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

51212322 is a wasteful number, since it uses less digits than its factorization.

51212322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406462 (or 406459 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 51212322 is about 7156.2785021266. The cubic root of 51212322 is about 371.3568926630.

Adding to 51212322 its reverse (22321215), we get a palindrome (73533537).

The spelling of 51212322 in words is "fifty-one million, two hundred twelve thousand, three hundred twenty-two".