61612223 has 2 divisors, whose sum is σ = 61612224. Its totient is φ = 61612222.

The previous prime is 61612183. The next prime is 61612237. The reversal of 61612223 is 32221616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61612223 - 2¹⁴ = 61595839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61612123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30806111 + 30806112.

It is an arithmetic number, because the mean of its divisors is an integer number (30806112).

Almost surely, 2^61612223 is an apocalyptic number.

61612223 is a deficient number, since it is larger than the sum of its proper divisors (1).

61612223 is an equidigital number, since it uses as much as digits as its factorization.

61612223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 61612223 is about 7849.3453867186. The cubic root of 61612223 is about 394.9622844938.

Adding to 61612223 its reverse (32221616), we get a palindrome (93833839).

The spelling of 61612223 in words is "sixty-one million, six hundred twelve thousand, two hundred twenty-three".