2505211555 has 32 divisors (see below), whose sum is σ = 3772965888. Its totient is φ = 1551312000.

The previous prime is 2505211549. The next prime is 2505211559. The reversal of 2505211555 is 5551125052.

It is not a de Polignac number, because 2505211555 - 2³ = 2505211547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505211559) 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 in 31 ways as a sum of consecutive naturals, for example, 36589 + ... + 79681.

It is an arithmetic number, because the mean of its divisors is an integer number (117905184).

Almost surely, 2^2505211555 is an apocalyptic number.

2505211555 is a deficient number, since it is larger than the sum of its proper divisors (1267754333).

2505211555 is a wasteful number, since it uses less digits than its factorization.

2505211555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43267.

The product of its (nonzero) digits is 12500, while the sum is 31.

The square root of 2505211555 is about 50052.0884179671. The cubic root of 2505211555 is about 1358.1512428407.

The spelling of 2505211555 in words is "two billion, five hundred five million, two hundred eleven thousand, five hundred fifty-five".