2830721533 has 2 divisors, whose sum is σ = 2830721534. Its totient is φ = 2830721532.

The previous prime is 2830721513. The next prime is 2830721567. The reversal of 2830721533 is 3351270382.

It is an a-pointer prime, because the next prime (2830721567) can be obtained adding 2830721533 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1627880409 + 1202841124 = 40347^2 + 34682^2 .

It is a cyclic number.

It is not a de Polignac number, because 2830721533 - 2²⁵ = 2797167101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2830721513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1415360766 + 1415360767.

It is an arithmetic number, because the mean of its divisors is an integer number (1415360767).

Almost surely, 2^2830721533 is an apocalyptic number.

It is an amenable number.

2830721533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2830721533 is an equidigital number, since it uses as much as digits as its factorization.

2830721533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 2830721533 is about 53204.5254936082. The cubic root of 2830721533 is about 1414.5958603945.

The spelling of 2830721533 in words is "two billion, eight hundred thirty million, seven hundred twenty-one thousand, five hundred thirty-three".