51452222 has 4 divisors (see below), whose sum is σ = 77178336. Its totient is φ = 25726110.

The previous prime is 51452213. The next prime is 51452227. The reversal of 51452222 is 22225415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22225415 = 5 ⋅4445083.

It is a super-2 number, since 2×51452222² = 5294662297474568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51452227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12863054 + ... + 12863057.

It is an arithmetic number, because the mean of its divisors is an integer number (19294584).

Almost surely, 2^51452222 is an apocalyptic number.

51452222 is a deficient number, since it is larger than the sum of its proper divisors (25726114).

51452222 is a wasteful number, since it uses less digits than its factorization.

51452222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25726113.

The product of its digits is 1600, while the sum is 23.

The square root of 51452222 is about 7173.0204237824. The cubic root of 51452222 is about 371.9358533938.

Adding to 51452222 its reverse (22225415), we get a palindrome (73677637).

The spelling of 51452222 in words is "fifty-one million, four hundred fifty-two thousand, two hundred twenty-two".