2501561533 has 2 divisors, whose sum is σ = 2501561534. Its totient is φ = 2501561532.

The previous prime is 2501561521. The next prime is 2501561599. The reversal of 2501561533 is 3351651052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1439974809 + 1061586724 = 37947^2 + 32582^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501561533 - 2²¹ = 2499464381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2501561495 and 2501561504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501567533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250780766 + 1250780767.

It is an arithmetic number, because the mean of its divisors is an integer number (1250780767).

Almost surely, 2^2501561533 is an apocalyptic number.

It is an amenable number.

2501561533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501561533 is an equidigital number, since it uses as much as digits as its factorization.

2501561533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 2501561533 is about 50015.6128923759. The cubic root of 2501561533 is about 1357.4913263297.

The spelling of 2501561533 in words is "two billion, five hundred one million, five hundred sixty-one thousand, five hundred thirty-three".