223143115120561 has 2 divisors, whose sum is σ = 223143115120562. Its totient is φ = 223143115120560.

The previous prime is 223143115120493. The next prime is 223143115120567. The reversal of 223143115120561 is 165021511341322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207629914978161 + 15513200142400 = 14409369^2 + 3938680^2 .

It is a cyclic number.

It is not a de Polignac number, because 223143115120561 - 2⁷ = 223143115120433 is a prime.

It is a super-3 number, since 3×223143115120561³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 223143115120561.

It is not a weakly prime, because it can be changed into another prime (223143115120567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111571557560280 + 111571557560281.

It is an arithmetic number, because the mean of its divisors is an integer number (111571557560281).

Almost surely, 2^{223143115120561} is an apocalyptic number.

It is an amenable number.

223143115120561 is a deficient number, since it is larger than the sum of its proper divisors (1).

223143115120561 is an equidigital number, since it uses as much as digits as its factorization.

223143115120561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 223143115120561 its reverse (165021511341322), we get a palindrome (388164626461883).

The spelling of 223143115120561 in words is "two hundred twenty-three trillion, one hundred forty-three billion, one hundred fifteen million, one hundred twenty thousand, five hundred sixty-one".