2561125333 has 4 divisors (see below), whose sum is σ = 2758134988. Its totient is φ = 2364115680.

The previous prime is 2561125313. The next prime is 2561125339. The reversal of 2561125333 is 3335211652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108201604 + 2452923729 = 10402^2 + 49527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561125333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561125295 and 2561125304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561125339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98504808 + ... + 98504833.

It is an arithmetic number, because the mean of its divisors is an integer number (689533747).

Almost surely, 2^2561125333 is an apocalyptic number.

It is an amenable number.

2561125333 is a deficient number, since it is larger than the sum of its proper divisors (197009655).

2561125333 is a wasteful number, since it uses less digits than its factorization.

2561125333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197009654.

The product of its digits is 16200, while the sum is 31.

The square root of 2561125333 is about 50607.5620139915. The cubic root of 2561125333 is about 1368.1811750985.

Adding to 2561125333 its reverse (3335211652), we get a palindrome (5896336985).

The spelling of 2561125333 in words is "two billion, five hundred sixty-one million, one hundred twenty-five thousand, three hundred thirty-three".