221524247234051 has 4 divisors (see below), whose sum is σ = 222181589214312. Its totient is φ = 220866905253792.

The previous prime is 221524247234033. The next prime is 221524247234089. The reversal of 221524247234051 is 150432742425122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221524247234051 is a prime.

It is a super-2 number, since 2×221524247234051² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221524247233993 and 221524247234011.

It is not an unprimeable number, because it can be changed into a prime (221524247234011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328670989625 + ... + 328670990298.

It is an arithmetic number, because the mean of its divisors is an integer number (55545397303578).

Almost surely, 2^{221524247234051} is an apocalyptic number.

221524247234051 is a deficient number, since it is larger than the sum of its proper divisors (657341980261).

221524247234051 is an equidigital number, since it uses as much as digits as its factorization.

221524247234051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657341980260.

The product of its (nonzero) digits is 1075200, while the sum is 44.

Adding to 221524247234051 its reverse (150432742425122), we get a palindrome (371956989659173).

The spelling of 221524247234051 in words is "two hundred twenty-one trillion, five hundred twenty-four billion, two hundred forty-seven million, two hundred thirty-four thousand, fifty-one".