452531021 has 4 divisors (see below), whose sum is σ = 453099612. Its totient is φ = 451962432.

The previous prime is 452530943. The next prime is 452531033. The reversal of 452531021 is 120135254.

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

It can be written as a sum of positive squares in 2 ways, for example, as 371332900 + 81198121 = 19270^2 + 9011^2 .

It is a cyclic number.

It is not a de Polignac number, because 452531021 - 2¹⁸ = 452268877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (452131021) 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, 283100 + ... + 284693.

It is an arithmetic number, because the mean of its divisors is an integer number (113274903).

Almost surely, 2^452531021 is an apocalyptic number.

It is an amenable number.

452531021 is a deficient number, since it is larger than the sum of its proper divisors (568591).

452531021 is an equidigital number, since it uses as much as digits as its factorization.

452531021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568590.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 452531021 is about 21272.7765230588. The cubic root of 452531021 is about 767.7434474066.

Adding to 452531021 its reverse (120135254), we get a palindrome (572666275).

The spelling of 452531021 in words is "four hundred fifty-two million, five hundred thirty-one thousand, twenty-one".