221441403437 has 2 divisors, whose sum is σ = 221441403438. Its totient is φ = 221441403436.

The previous prime is 221441403431. The next prime is 221441403451. The reversal of 221441403437 is 734304144122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204859432996 + 16581970441 = 452614^2 + 128771^2 .

It is a cyclic number.

It is not a de Polignac number, because 221441403437 - 2²⁶ = 221374294573 is a prime.

It is a super-2 number, since 2×221441403437² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221441403397 and 221441403406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221441403431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110720701718 + 110720701719.

It is an arithmetic number, because the mean of its divisors is an integer number (110720701719).

Almost surely, 2^221441403437 is an apocalyptic number.

It is an amenable number.

221441403437 is a deficient number, since it is larger than the sum of its proper divisors (1).

221441403437 is an equidigital number, since it uses as much as digits as its factorization.

221441403437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 221441403437 its reverse (734304144122), we get a palindrome (955745547559).

The spelling of 221441403437 in words is "two hundred twenty-one billion, four hundred forty-one million, four hundred three thousand, four hundred thirty-seven".