2531954388 has 144 divisors (see below), whose sum is σ = 6466098240. Its totient is φ = 769950720.

The previous prime is 2531954387. The next prime is 2531954393. The reversal of 2531954388 is 8834591352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531954387) 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 47 ways as a sum of consecutive naturals, for example, 22406620 + ... + 22406732.

It is an arithmetic number, because the mean of its divisors is an integer number (44903460).

Almost surely, 2^2531954388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2531954388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3233049120).

2531954388 is an abundant number, since it is smaller than the sum of its proper divisors (3934143852).

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

2531954388 is a wasteful number, since it uses less digits than its factorization.

2531954388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 245 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 48.

The square root of 2531954388 is about 50318.5292710349. The cubic root of 2531954388 is about 1362.9668484988.

The spelling of 2531954388 in words is "two billion, five hundred thirty-one million, nine hundred fifty-four thousand, three hundred eighty-eight".