61611223 has 2 divisors, whose sum is σ = 61611224. Its totient is φ = 61611222.

The previous prime is 61611191. The next prime is 61611239. The reversal of 61611223 is 32211616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61611223 - 2⁵ = 61611191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61611194 and 61611203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61611293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30805611 + 30805612.

It is an arithmetic number, because the mean of its divisors is an integer number (30805612).

Almost surely, 2^61611223 is an apocalyptic number.

61611223 is a deficient number, since it is larger than the sum of its proper divisors (1).

61611223 is an equidigital number, since it uses as much as digits as its factorization.

61611223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 61611223 is about 7849.2816868807. The cubic root of 61611223 is about 394.9601476644.

Adding to 61611223 its reverse (32211616), we get a palindrome (93822839).

The spelling of 61611223 in words is "sixty-one million, six hundred eleven thousand, two hundred twenty-three".