2251531544 has 32 divisors (see below), whose sum is σ = 4485287520. Its totient is φ = 1055909376.

The previous prime is 2251531543. The next prime is 2251531547. The reversal of 2251531544 is 4451351522.

It is a self number, because there is not a number n which added to its sum of digits gives 2251531544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251531543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11597 + ... + 68099.

It is an arithmetic number, because the mean of its divisors is an integer number (140165235).

Almost surely, 2^2251531544 is an apocalyptic number.

It is an amenable number.

2251531544 is a deficient number, since it is larger than the sum of its proper divisors (2233755976).

2251531544 is a wasteful number, since it uses less digits than its factorization.

2251531544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56819 (or 56815 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 2251531544 is about 47450.3060474851. The cubic root of 2251531544 is about 1310.6679467632.

The spelling of 2251531544 in words is "two billion, two hundred fifty-one million, five hundred thirty-one thousand, five hundred forty-four".