223261657261 has 2 divisors, whose sum is σ = 223261657262. Its totient is φ = 223261657260.

The previous prime is 223261657253. The next prime is 223261657301. The reversal of 223261657261 is 162756162322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220557033225 + 2704624036 = 469635^2 + 52006^2 .

It is a cyclic number.

It is not a de Polignac number, because 223261657261 - 2³ = 223261657253 is a prime.

It is a super-3 number, since 3×223261657261³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223261657231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111630828630 + 111630828631.

It is an arithmetic number, because the mean of its divisors is an integer number (111630828631).

Almost surely, 2^223261657261 is an apocalyptic number.

It is an amenable number.

223261657261 is a deficient number, since it is larger than the sum of its proper divisors (1).

223261657261 is an equidigital number, since it uses as much as digits as its factorization.

223261657261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The spelling of 223261657261 in words is "two hundred twenty-three billion, two hundred sixty-one million, six hundred fifty-seven thousand, two hundred sixty-one".