2531205240 has 32 divisors (see below), whose sum is σ = 7593616080. Its totient is φ = 674988032.

The previous prime is 2531205221. The next prime is 2531205247. The reversal of 2531205240 is 425021352.

2531205240 = T₁₀₅₈₄ + T₁₀₅₈₅ + ... + T₁₀₆₂₈.

2531205240 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2531205240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531205247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10546569 + ... + 10546808.

Almost surely, 2^2531205240 is an apocalyptic number.

2531205240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531205240 is an abundant number, since it is smaller than the sum of its proper divisors (5062410840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531205240 is a wasteful number, since it uses less digits than its factorization.

2531205240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21093391 (or 21093387 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2531205240 is about 50311.0846633225. The cubic root of 2531205240 is about 1362.8324115577.

Adding to 2531205240 its reverse (425021352), we get a palindrome (2956226592).

The spelling of 2531205240 in words is "two billion, five hundred thirty-one million, two hundred five thousand, two hundred forty".