5661111229 has 2 divisors, whose sum is σ = 5661111230. Its totient is φ = 5661111228.

The previous prime is 5661111193. The next prime is 5661111271. The reversal of 5661111229 is 9221111665.

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., 5512320025 + 148791204 = 74245^2 + 12198^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661111229 - 2⁹ = 5661110717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5661111194 and 5661111203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661111289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830555614 + 2830555615.

It is an arithmetic number, because the mean of its divisors is an integer number (2830555615).

Almost surely, 2^5661111229 is an apocalyptic number.

It is an amenable number.

5661111229 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661111229 is an equidigital number, since it uses as much as digits as its factorization.

5661111229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 5661111229 is about 75240.3563853867. The cubic root of 5661111229 is about 1782.2442790521.

The spelling of 5661111229 in words is "five billion, six hundred sixty-one million, one hundred eleven thousand, two hundred twenty-nine".