2531536420 has 48 divisors (see below), whose sum is σ = 6216997248. Its totient is φ = 847768320.

The previous prime is 2531536391. The next prime is 2531536457. The reversal of 2531536420 is 246351352.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204241 + ... + 216280.

It is an arithmetic number, because the mean of its divisors is an integer number (129520776).

Almost surely, 2^2531536420 is an apocalyptic number.

2531536420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531536420 is an abundant number, since it is smaller than the sum of its proper divisors (3685460828).

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

2531536420 is a wasteful number, since it uses less digits than its factorization.

2531536420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420580 (or 420578 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2531536420 is about 50314.3758780729. The cubic root of 2531536420 is about 1362.8918461106.

Adding to 2531536420 its reverse (246351352), we get a palindrome (2777887772).

The spelling of 2531536420 in words is "two billion, five hundred thirty-one million, five hundred thirty-six thousand, four hundred twenty".