621131452 has 12 divisors (see below), whose sum is σ = 1087271640. Its totient is φ = 310482416.

The previous prime is 621131443. The next prime is 621131453. The reversal of 621131452 is 254131126.

It is a happy number.

621131452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621131453) 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, 2203 + ... + 35314.

It is an arithmetic number, because the mean of its divisors is an integer number (90605970).

Almost surely, 2^621131452 is an apocalyptic number.

It is an amenable number.

621131452 is a deficient number, since it is larger than the sum of its proper divisors (466140188).

621131452 is a wasteful number, since it uses less digits than its factorization.

621131452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41660 (or 41658 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 621131452 is about 24922.5089427208. The cubic root of 621131452 is about 853.2202880985.

Adding to 621131452 its reverse (254131126), we get a palindrome (875262578).

The spelling of 621131452 in words is "six hundred twenty-one million, one hundred thirty-one thousand, four hundred fifty-two".