2778233533 has 2 divisors, whose sum is σ = 2778233534. Its totient is φ = 2778233532.

The previous prime is 2778233461. The next prime is 2778233539. The reversal of 2778233533 is 3353328772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1719512089 + 1058721444 = 41467^2 + 32538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778233533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2778233533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778233539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389116766 + 1389116767.

It is an arithmetic number, because the mean of its divisors is an integer number (1389116767).

Almost surely, 2^2778233533 is an apocalyptic number.

It is an amenable number.

2778233533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778233533 is an equidigital number, since it uses as much as digits as its factorization.

2778233533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 43.

The square root of 2778233533 is about 52708.9511658124. The cubic root of 2778233533 is about 1405.7979844004.

The spelling of 2778233533 in words is "two billion, seven hundred seventy-eight million, two hundred thirty-three thousand, five hundred thirty-three".