2531640330 has 96 divisors (see below), whose sum is σ = 6691621248. Its totient is φ = 663984000.

The previous prime is 2531640329. The next prime is 2531640373. The reversal of 2531640330 is 330461352.

It is a happy number.

2531640330 is a `hidden beast` number, since 253 + 1 + 6 + 403 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2531640294 and 2531640303.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1453260 + ... + 1455000.

It is an arithmetic number, because the mean of its divisors is an integer number (69704388).

Almost surely, 2^2531640330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2531640330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3345810624).

2531640330 is an abundant number, since it is smaller than the sum of its proper divisors (4159980918).

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

2531640330 is a wasteful number, since it uses less digits than its factorization.

2531640330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 2531640330 is about 50315.4084749394. The cubic root of 2531640330 is about 1362.9104930415.

The spelling of 2531640330 in words is "two billion, five hundred thirty-one million, six hundred forty thousand, three hundred thirty".