5551161233 has 2 divisors, whose sum is σ = 5551161234. Its totient is φ = 5551161232.

The previous prime is 5551161139. The next prime is 5551161241. The reversal of 5551161233 is 3321611555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4994531584 + 556629649 = 70672^2 + 23593^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551161233 - 2¹⁴ = 5551144849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5551161233.

It is not a weakly prime, because it can be changed into another prime (5551160233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775580616 + 2775580617.

It is an arithmetic number, because the mean of its divisors is an integer number (2775580617).

Almost surely, 2^5551161233 is an apocalyptic number.

It is an amenable number.

5551161233 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551161233 is an equidigital number, since it uses as much as digits as its factorization.

5551161233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 5551161233 is about 74506.1154067235. The cubic root of 5551161233 is about 1770.6305256782.

Adding to 5551161233 its reverse (3321611555), we get a palindrome (8872772788).

The spelling of 5551161233 in words is "five billion, five hundred fifty-one million, one hundred sixty-one thousand, two hundred thirty-three".