1641321533 has 2 divisors, whose sum is σ = 1641321534. Its totient is φ = 1641321532.

The previous prime is 1641321509. The next prime is 1641321587. The reversal of 1641321533 is 3351231461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1352253529 + 289068004 = 36773^2 + 17002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641321533 - 2¹⁶ = 1641255997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1641321496 and 1641321505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641321433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820660766 + 820660767.

It is an arithmetic number, because the mean of its divisors is an integer number (820660767).

Almost surely, 2^1641321533 is an apocalyptic number.

It is an amenable number.

1641321533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641321533 is an equidigital number, since it uses as much as digits as its factorization.

1641321533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 1641321533 is about 40513.2266426657. The cubic root of 1641321533 is about 1179.5903809011.

Adding to 1641321533 its reverse (3351231461), we get a palindrome (4992552994).

The spelling of 1641321533 in words is "one billion, six hundred forty-one million, three hundred twenty-one thousand, five hundred thirty-three".