61512223 has 2 divisors, whose sum is σ = 61512224. Its totient is φ = 61512222.

The previous prime is 61512211. The next prime is 61512247. The reversal of 61512223 is 32221516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61512223 - 2⁹ = 61511711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61512194 and 61512203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61512203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30756111 + 30756112.

It is an arithmetic number, because the mean of its divisors is an integer number (30756112).

Almost surely, 2^61512223 is an apocalyptic number.

61512223 is a deficient number, since it is larger than the sum of its proper divisors (1).

61512223 is an equidigital number, since it uses as much as digits as its factorization.

61512223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 61512223 is about 7842.9728419777. The cubic root of 61512223 is about 394.7484870037.

Adding to 61512223 its reverse (32221516), we get a palindrome (93733739).

The spelling of 61512223 in words is "sixty-one million, five hundred twelve thousand, two hundred twenty-three".