451223442 has 12 divisors (see below), whose sum is σ = 977650830. Its totient is φ = 150407808.

The previous prime is 451223411. The next prime is 451223449. The reversal of 451223442 is 244322154.

It can be written as a sum of positive squares in only one way, i.e., 370601001 + 80622441 = 19251^2 + 8979^2 .

It is a super-2 number, since 2×451223442² = 407205189220654728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (451223449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12533967 + ... + 12534002.

Almost surely, 2^451223442 is an apocalyptic number.

451223442 is an abundant number, since it is smaller than the sum of its proper divisors (526427388).

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

451223442 is a wasteful number, since it uses less digits than its factorization.

451223442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25067977 (or 25067974 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 451223442 is about 21242.0206665938. The cubic root of 451223442 is about 767.0032744537.

Adding to 451223442 its reverse (244322154), we get a palindrome (695545596).

The spelling of 451223442 in words is "four hundred fifty-one million, two hundred twenty-three thousand, four hundred forty-two".