2251511233 has 2 divisors, whose sum is σ = 2251511234. Its totient is φ = 2251511232.

The previous prime is 2251511219. The next prime is 2251511237. The reversal of 2251511233 is 3321151522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2234263824 + 17247409 = 47268^2 + 4153^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251511233 - 2²⁹ = 1714640321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2251511198 and 2251511207.

It is not a weakly prime, because it can be changed into another prime (2251511237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125755616 + 1125755617.

It is an arithmetic number, because the mean of its divisors is an integer number (1125755617).

Almost surely, 2^2251511233 is an apocalyptic number.

It is an amenable number.

2251511233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251511233 is an equidigital number, since it uses as much as digits as its factorization.

2251511233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 2251511233 is about 47450.0920230931. The cubic root of 2251511233 is about 1310.6640055857.

Adding to 2251511233 its reverse (3321151522), we get a palindrome (5572662755).

The spelling of 2251511233 in words is "two billion, two hundred fifty-one million, five hundred eleven thousand, two hundred thirty-three".