451231540 has 12 divisors (see below), whose sum is σ = 947586276. Its totient is φ = 180492608.

The previous prime is 451231511. The next prime is 451231541. The reversal of 451231540 is 45132154.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 111640356 + 339591184 = 10566^2 + 18428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451231541) 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 3 ways as a sum of consecutive naturals, for example, 11280769 + ... + 11280808.

It is an arithmetic number, because the mean of its divisors is an integer number (78965523).

Almost surely, 2^451231540 is an apocalyptic number.

It is an amenable number.

451231540 is an abundant number, since it is smaller than the sum of its proper divisors (496354736).

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

451231540 is a wasteful number, since it uses less digits than its factorization.

451231540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22561586 (or 22561584 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 451231540 is about 21242.2112784898. The cubic root of 451231540 is about 767.0078628348.

Adding to 451231540 its reverse (45132154), we get a palindrome (496363694).

The spelling of 451231540 in words is "four hundred fifty-one million, two hundred thirty-one thousand, five hundred forty".