2591221248 has 480 divisors, whose sum is σ = 9549745920. Its totient is φ = 656916480.

The previous prime is 2591221207. The next prime is 2591221267. The reversal of 2591221248 is 8421221952.

2591221248 is a `hidden beast` number, since 2 + 591 + 2 + 21 + 2 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 23772618 + ... + 23772726.

It is an arithmetic number, because the mean of its divisors is an integer number (19895304).

Almost surely, 2^2591221248 is an apocalyptic number.

2591221248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591221248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4774872960).

2591221248 is an abundant number, since it is smaller than the sum of its proper divisors (6958524672).

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

2591221248 is a wasteful number, since it uses less digits than its factorization.

2591221248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 199 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2591221248 is about 50904.0396039450. The cubic root of 2591221248 is about 1373.5195080705.

The spelling of 2591221248 in words is "two billion, five hundred ninety-one million, two hundred twenty-one thousand, two hundred forty-eight".