611011231 has 2 divisors, whose sum is σ = 611011232. Its totient is φ = 611011230.

The previous prime is 611011207. The next prime is 611011243. The reversal of 611011231 is 132110116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611011231 - 2⁵ = 611011199 is a prime.

It is a super-2 number, since 2×611011231² = 746669448816270722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611011631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305505615 + 305505616.

It is an arithmetic number, because the mean of its divisors is an integer number (305505616).

Almost surely, 2^611011231 is an apocalyptic number.

611011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

611011231 is an equidigital number, since it uses as much as digits as its factorization.

611011231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 611011231 is about 24718.6413663858. The cubic root of 611011231 is about 848.5609935844.

Adding to 611011231 its reverse (132110116), we get a palindrome (743121347).

The spelling of 611011231 in words is "six hundred eleven million, eleven thousand, two hundred thirty-one".