451143450 has 108 divisors (see below), whose sum is σ = 1287935610. Its totient is φ = 113195520.

The previous prime is 451143449. The next prime is 451143457. The reversal of 451143450 is 54341154.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 25010001 + 426133449 = 5001^2 + 20643^2 .

It is not an unprimeable number, because it can be changed into a prime (451143457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 128316 + ... + 131784.

Almost surely, 2^451143450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451143450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643967805).

451143450 is an abundant number, since it is smaller than the sum of its proper divisors (836792160).

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

451143450 is a wasteful number, since it uses less digits than its factorization.

451143450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3496 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 451143450 is about 21240.1377114180. The cubic root of 451143450 is about 766.9579475003.

It can be divided in two parts, 4511 and 43450, that added together give a square (47961 = 219²).

The spelling of 451143450 in words is "four hundred fifty-one million, one hundred forty-three thousand, four hundred fifty".