61018229 has 2 divisors, whose sum is σ = 61018230. Its totient is φ = 61018228.

The previous prime is 61018193. The next prime is 61018249. The reversal of 61018229 is 92281016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 3713329 = 7570^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 61018229 - 2⁸ = 61017973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61018249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30509114 + 30509115.

It is an arithmetic number, because the mean of its divisors is an integer number (30509115).

Almost surely, 2^61018229 is an apocalyptic number.

It is an amenable number.

61018229 is a deficient number, since it is larger than the sum of its proper divisors (1).

61018229 is an equidigital number, since it uses as much as digits as its factorization.

61018229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 61018229 is about 7811.4165808770. The cubic root of 61018229 is about 393.6889266492.

The spelling of 61018229 in words is "sixty-one million, eighteen thousand, two hundred twenty-nine".