451621422 has 192 divisors, whose sum is σ = 1261578240. Its totient is φ = 113743872.

The previous prime is 451621409. The next prime is 451621453. The reversal of 451621422 is 224126154.

451621422 is a `hidden beast` number, since 4 + 516 + 2 + 142 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4384623 + ... + 4384725.

It is an arithmetic number, because the mean of its divisors is an integer number (6570720).

Almost surely, 2^451621422 is an apocalyptic number.

451621422 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 451621422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630789120).

451621422 is an abundant number, since it is smaller than the sum of its proper divisors (809956818).

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

451621422 is a wasteful number, since it uses less digits than its factorization.

451621422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 244 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 451621422 is about 21251.3863547770. The cubic root of 451621422 is about 767.2287076755.

Adding to 451621422 its reverse (224126154), we get a palindrome (675747576).

The spelling of 451621422 in words is "four hundred fifty-one million, six hundred twenty-one thousand, four hundred twenty-two".