2251531230 has 48 divisors (see below), whose sum is σ = 5851329840. Its totient is φ = 554221824.

The previous prime is 2251531207. The next prime is 2251531231. The reversal of 2251531230 is 321351522.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251531230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251531231) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 216975 + ... + 227114.

It is an arithmetic number, because the mean of its divisors is an integer number (121902705).

Almost surely, 2^2251531230 is an apocalyptic number.

2251531230 is an abundant number, since it is smaller than the sum of its proper divisors (3599798610).

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

2251531230 is a wasteful number, since it uses less digits than its factorization.

2251531230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444125 (or 444112 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2251531230 is about 47450.3027387603. The cubic root of 2251531230 is about 1310.6678858344.

Adding to 2251531230 its reverse (321351522), we get a palindrome (2572882752).

The spelling of 2251531230 in words is "two billion, two hundred fifty-one million, five hundred thirty-one thousand, two hundred thirty".