621310441 has 8 divisors (see below), whose sum is σ = 658942344. Its totient is φ = 583799040.

The previous prime is 621310439. The next prime is 621310447. The reversal of 621310441 is 144013126.

It can be written as a sum of positive squares in 4 ways, for example, as 78234025 + 543076416 = 8845^2 + 23304^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621310441 - 2¹ = 621310439 is a prime.

It is a super-2 number, since 2×621310441² = 772053328191228962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621310447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19390 + ... + 40231.

It is an arithmetic number, because the mean of its divisors is an integer number (82367793).

Almost surely, 2^621310441 is an apocalyptic number.

It is an amenable number.

621310441 is a deficient number, since it is larger than the sum of its proper divisors (37631903).

621310441 is a wasteful number, since it uses less digits than its factorization.

621310441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60251.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 621310441 is about 24926.0995946016. The cubic root of 621310441 is about 853.3022366021.

Adding to 621310441 its reverse (144013126), we get a palindrome (765323567).

The spelling of 621310441 in words is "six hundred twenty-one million, three hundred ten thousand, four hundred forty-one".