2531256247 has 32 divisors (see below), whose sum is σ = 2965878720. Its totient is φ = 2139955200.

The previous prime is 2531256197. The next prime is 2531256257. The reversal of 2531256247 is 7426521352.

It is a cyclic number.

It is not a de Polignac number, because 2531256247 - 2¹¹ = 2531254199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531256257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1580247 + ... + 1581847.

It is an arithmetic number, because the mean of its divisors is an integer number (92683710).

Almost surely, 2^2531256247 is an apocalyptic number.

2531256247 is a deficient number, since it is larger than the sum of its proper divisors (434622473).

2531256247 is a wasteful number, since it uses less digits than its factorization.

2531256247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843.

The product of its digits is 100800, while the sum is 37.

The square root of 2531256247 is about 50311.5915768921. The cubic root of 2531256247 is about 1362.8415657642.

Adding to 2531256247 its reverse (7426521352), we get a palindrome (9957777599).

The spelling of 2531256247 in words is "two billion, five hundred thirty-one million, two hundred fifty-six thousand, two hundred forty-seven".