61061213 has 2 divisors, whose sum is σ = 61061214. Its totient is φ = 61061212.

The previous prime is 61061201. The next prime is 61061237. The reversal of 61061213 is 31216016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31663129 + 29398084 = 5627^2 + 5422^2 .

It is a cyclic number.

It is not a de Polignac number, because 61061213 - 2⁶ = 61061149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61061513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30530606 + 30530607.

It is an arithmetic number, because the mean of its divisors is an integer number (30530607).

Almost surely, 2^61061213 is an apocalyptic number.

It is an amenable number.

61061213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61061213 is an equidigital number, since it uses as much as digits as its factorization.

61061213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 61061213 is about 7814.1674540542. The cubic root of 61061213 is about 393.7813490451.

Adding to 61061213 its reverse (31216016), we get a palindrome (92277229).

The spelling of 61061213 in words is "sixty-one million, sixty-one thousand, two hundred thirteen".