2505280553 has 4 divisors (see below), whose sum is σ = 2546350788. Its totient is φ = 2464210320.

The previous prime is 2505280537. The next prime is 2505280567. The reversal of 2505280553 is 3550825052.

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 457446544 + 2047834009 = 21388^2 + 45253^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505280553 - 2⁴ = 2505280537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505280573) 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, 20535026 + ... + 20535147.

It is an arithmetic number, because the mean of its divisors is an integer number (636587697).

Almost surely, 2^2505280553 is an apocalyptic number.

It is an amenable number.

2505280553 is a deficient number, since it is larger than the sum of its proper divisors (41070235).

2505280553 is an equidigital number, since it uses as much as digits as its factorization.

2505280553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41070234.

The product of its (nonzero) digits is 60000, while the sum is 35.

The square root of 2505280553 is about 50052.7776751700. Note that the first 3 decimals coincide. The cubic root of 2505280553 is about 1358.1637113631.

The spelling of 2505280553 in words is "two billion, five hundred five million, two hundred eighty thousand, five hundred fifty-three".