61220611 has 2 divisors, whose sum is σ = 61220612. Its totient is φ = 61220610.

The previous prime is 61220597. The next prime is 61220617. The reversal of 61220611 is 11602216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61220611 - 2¹³ = 61212419 is a prime.

It is a super-2 number, since 2×61220611² = 7495926422426642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61220617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30610305 + 30610306.

It is an arithmetic number, because the mean of its divisors is an integer number (30610306).

Almost surely, 2^61220611 is an apocalyptic number.

61220611 is a deficient number, since it is larger than the sum of its proper divisors (1).

61220611 is an equidigital number, since it uses as much as digits as its factorization.

61220611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61220611 is about 7824.3601016313. The cubic root of 61220611 is about 394.1237017852.

Adding to 61220611 its reverse (11602216), we get a palindrome (72822827).

The spelling of 61220611 in words is "sixty-one million, two hundred twenty thousand, six hundred eleven".