61561223 has 8 divisors (see below), whose sum is σ = 62215296. Its totient is φ = 60910200.

The previous prime is 61561219. The next prime is 61561231. The reversal of 61561223 is 32216516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61561223 - 2² = 61561219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61561192 and 61561201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74390 + ... + 75212.

It is an arithmetic number, because the mean of its divisors is an integer number (7776912).

Almost surely, 2^61561223 is an apocalyptic number.

61561223 is a deficient number, since it is larger than the sum of its proper divisors (654073).

61561223 is a wasteful number, since it uses less digits than its factorization.

61561223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525.

The product of its digits is 2160, while the sum is 26.

The square root of 61561223 is about 7846.0960356090. The cubic root of 61561223 is about 394.8532767031.

Adding to 61561223 its reverse (32216516), we get a palindrome (93777739).

The spelling of 61561223 in words is "sixty-one million, five hundred sixty-one thousand, two hundred twenty-three".