2531145630 has 128 divisors (see below), whose sum is σ = 6868592640. Its totient is φ = 592289280.

The previous prime is 2531145613. The next prime is 2531145677. The reversal of 2531145630 is 365411352.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1622791 + ... + 1624349.

It is an arithmetic number, because the mean of its divisors is an integer number (53660880).

Almost surely, 2^2531145630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2531145630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3434296320).

2531145630 is an abundant number, since it is smaller than the sum of its proper divisors (4337447010).

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

2531145630 is a wasteful number, since it uses less digits than its factorization.

2531145630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2531145630 is about 50310.4922456539. The cubic root of 2531145630 is about 1362.8217132184.

Adding to 2531145630 its reverse (365411352), we get a palindrome (2896556982).

The spelling of 2531145630 in words is "two billion, five hundred thirty-one million, one hundred forty-five thousand, six hundred thirty".