451123231 has 4 divisors (see below), whose sum is σ = 485825032. Its totient is φ = 416421432.

The previous prime is 451123207. The next prime is 451123241. The reversal of 451123231 is 132321154.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 451123231 - 2⁷ = 451123103 is a prime.

It is a super-2 number, since 2×451123231² = 407024339095758722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451123241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17350881 + ... + 17350906.

It is an arithmetic number, because the mean of its divisors is an integer number (121456258).

Almost surely, 2^451123231 is an apocalyptic number.

451123231 is a deficient number, since it is larger than the sum of its proper divisors (34701801).

451123231 is a wasteful number, since it uses less digits than its factorization.

451123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34701800.

The product of its digits is 720, while the sum is 22.

The square root of 451123231 is about 21239.6617440109. The cubic root of 451123231 is about 766.9464896854.

Adding to 451123231 its reverse (132321154), we get a palindrome (583444385).

The spelling of 451123231 in words is "four hundred fifty-one million, one hundred twenty-three thousand, two hundred thirty-one".