451323222 has 48 divisors (see below), whose sum is σ = 1052038512. Its totient is φ = 128701440.

The previous prime is 451323217. The next prime is 451323239. The reversal of 451323222 is 222323154.

It is a super-2 number, since 2×451323222² = 407385301432922568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 451323192 and 451323201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196722 + ... + 199002.

It is an arithmetic number, because the mean of its divisors is an integer number (21917469).

Almost surely, 2^451323222 is an apocalyptic number.

451323222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 451323222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526019256).

451323222 is an abundant number, since it is smaller than the sum of its proper divisors (600715290).

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

451323222 is a wasteful number, since it uses less digits than its factorization.

451323222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973 (or 2966 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 451323222 is about 21244.3691833860. The cubic root of 451323222 is about 767.0598066424.

Adding to 451323222 its reverse (222323154), we get a palindrome (673646376).

The spelling of 451323222 in words is "four hundred fifty-one million, three hundred twenty-three thousand, two hundred twenty-two".