221630424610457 has 2 divisors, whose sum is σ = 221630424610458. Its totient is φ = 221630424610456.

The previous prime is 221630424610417. The next prime is 221630424610487. The reversal of 221630424610457 is 754016424036122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142009264231696 + 79621160378761 = 11916764^2 + 8923069^2 .

It is a cyclic number.

It is not a de Polignac number, because 221630424610457 - 2¹² = 221630424606361 is a prime.

It is a super-2 number, since 2×221630424610457² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221630424610417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110815212305228 + 110815212305229.

It is an arithmetic number, because the mean of its divisors is an integer number (110815212305229).

Almost surely, 2^{221630424610457} is an apocalyptic number.

It is an amenable number.

221630424610457 is a deficient number, since it is larger than the sum of its proper divisors (1).

221630424610457 is an equidigital number, since it uses as much as digits as its factorization.

221630424610457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 47.

Adding to 221630424610457 its reverse (754016424036122), we get a palindrome (975646848646579).

The spelling of 221630424610457 in words is "two hundred twenty-one trillion, six hundred thirty billion, four hundred twenty-four million, six hundred ten thousand, four hundred fifty-seven".