451520225 has 24 divisors (see below), whose sum is σ = 606862200. Its totient is φ = 331269120.

The previous prime is 451520207. The next prime is 451520243. The reversal of 451520225 is 522025154.

It is an interprime number because it is at equal distance from previous prime (451520207) and next prime (451520243).

It can be written as a sum of positive squares in 12 ways, for example, as 394260736 + 57259489 = 19856^2 + 7567^2 .

It is not a de Polignac number, because 451520225 - 2¹⁴ = 451503841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 451520194 and 451520203.

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, 46601 + ... + 55449.

It is an arithmetic number, because the mean of its divisors is an integer number (25285925).

Almost surely, 2^451520225 is an apocalyptic number.

It is an amenable number.

451520225 is a deficient number, since it is larger than the sum of its proper divisors (155341975).

451520225 is a wasteful number, since it uses less digits than its factorization.

451520225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9029 (or 9024 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 451520225 is about 21249.0052708356. The cubic root of 451520225 is about 767.1713978436.

Adding to 451520225 its reverse (522025154), we get a palindrome (973545379).

The spelling of 451520225 in words is "four hundred fifty-one million, five hundred twenty thousand, two hundred twenty-five".