2545578531 has 12 divisors (see below), whose sum is σ = 3677500008. Its totient is φ = 1696797024.

The previous prime is 2545578493. The next prime is 2545578551. The reversal of 2545578531 is 1358755452.

2545578531 is a `hidden beast` number, since 2 + 5 + 45 + 5 + 78 + 531 = 666.

It is not a de Polignac number, because 2545578531 - 2¹⁸ = 2545316387 is a prime.

It is a super-2 number, since 2×2545578531² = 12959940114976235922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2545578551) 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 11 ways as a sum of consecutive naturals, for example, 57031 + ... + 91343.

It is an arithmetic number, because the mean of its divisors is an integer number (306458334).

Almost surely, 2^2545578531 is an apocalyptic number.

2545578531 is a deficient number, since it is larger than the sum of its proper divisors (1131921477).

2545578531 is a wasteful number, since it uses less digits than its factorization.

2545578531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42562 (or 42559 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 2545578531 is about 50453.7266314392. The cubic root of 2545578531 is about 1365.4071304977.

The spelling of 2545578531 in words is "two billion, five hundred forty-five million, five hundred seventy-eight thousand, five hundred thirty-one".