6221415536537 has 2 divisors, whose sum is σ = 6221415536538. Its totient is φ = 6221415536536.

The previous prime is 6221415536533. The next prime is 6221415536647. The reversal of 6221415536537 is 7356355141226.

6221415536537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3748332195721 + 2473083340816 = 1936061^2 + 1572604^2 .

It is a cyclic number.

It is not a de Polignac number, because 6221415536537 - 2² = 6221415536533 is a prime.

It is a super-2 number, since 2×6221415536537² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6221415536533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110707768268 + 3110707768269.

It is an arithmetic number, because the mean of its divisors is an integer number (3110707768269).

Almost surely, 2^{6221415536537} is an apocalyptic number.

It is an amenable number.

6221415536537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221415536537 is an equidigital number, since it uses as much as digits as its factorization.

6221415536537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 50.

The spelling of 6221415536537 in words is "six trillion, two hundred twenty-one billion, four hundred fifteen million, five hundred thirty-six thousand, five hundred thirty-seven".