61212233 has 2 divisors, whose sum is σ = 61212234. Its totient is φ = 61212232.

The previous prime is 61212227. The next prime is 61212247. The reversal of 61212233 is 33221216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59644729 + 1567504 = 7723^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 61212233 - 2⁶ = 61212169 is a prime.

It is not a weakly prime, because it can be changed into another prime (61212293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30606116 + 30606117.

It is an arithmetic number, because the mean of its divisors is an integer number (30606117).

Almost surely, 2^61212233 is an apocalyptic number.

It is an amenable number.

61212233 is a deficient number, since it is larger than the sum of its proper divisors (1).

61212233 is an equidigital number, since it uses as much as digits as its factorization.

61212233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 20.

The square root of 61212233 is about 7823.8247040690. The cubic root of 61212233 is about 394.1057224427.

Adding to 61212233 its reverse (33221216), we get a palindrome (94433449).

The spelling of 61212233 in words is "sixty-one million, two hundred twelve thousand, two hundred thirty-three".