2531204420 has 12 divisors (see below), whose sum is σ = 5315529324. Its totient is φ = 1012481760.

The previous prime is 2531204387. The next prime is 2531204449. The reversal of 2531204420 is 244021352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 425679424 + 2105524996 = 20632^2 + 45886^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63280091 + ... + 63280130.

It is an arithmetic number, because the mean of its divisors is an integer number (442960777).

Almost surely, 2^2531204420 is an apocalyptic number.

2531204420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531204420 is an abundant number, since it is smaller than the sum of its proper divisors (2784324904).

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

2531204420 is a wasteful number, since it uses less digits than its factorization.

2531204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126560230 (or 126560228 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2531204420 is about 50311.0765140242. The cubic root of 2531204420 is about 1362.8322643916.

Adding to 2531204420 its reverse (244021352), we get a palindrome (2775225772).

The spelling of 2531204420 in words is "two billion, five hundred thirty-one million, two hundred four thousand, four hundred twenty".