221412504736537 has 4 divisors (see below), whose sum is σ = 231039135377280. Its totient is φ = 211785874095796.

The previous prime is 221412504736529. The next prime is 221412504736541. The reversal of 221412504736537 is 735637405214122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221412504736537 - 2³ = 221412504736529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221412504736637) 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, 4813315320337 + ... + 4813315320382.

It is an arithmetic number, because the mean of its divisors is an integer number (57759783844320).

Almost surely, 2^{221412504736537} is an apocalyptic number.

It is an amenable number.

221412504736537 is a deficient number, since it is larger than the sum of its proper divisors (9626630640743).

221412504736537 is an equidigital number, since it uses as much as digits as its factorization.

221412504736537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626630640742.

The product of its (nonzero) digits is 8467200, while the sum is 52.

The spelling of 221412504736537 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred four million, seven hundred thirty-six thousand, five hundred thirty-seven".