2531523878 has 32 divisors (see below), whose sum is σ = 4143636000. Its totient is φ = 1152999936.

The previous prime is 2531523871. The next prime is 2531523889. The reversal of 2531523878 is 8783251352.

It is a super-2 number, since 2×2531523878² = 12817226289768317768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531523871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623198 + ... + 627246.

It is an arithmetic number, because the mean of its divisors is an integer number (129488625).

Almost surely, 2^2531523878 is an apocalyptic number.

2531523878 is a deficient number, since it is larger than the sum of its proper divisors (1612112122).

2531523878 is a wasteful number, since it uses less digits than its factorization.

2531523878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4376.

The product of its digits is 403200, while the sum is 44.

The square root of 2531523878 is about 50314.2512415717. The cubic root of 2531523878 is about 1362.8895953802.

The spelling of 2531523878 in words is "two billion, five hundred thirty-one million, five hundred twenty-three thousand, eight hundred seventy-eight".