2156225748 has 48 divisors (see below), whose sum is σ = 5211958080. Its totient is φ = 692987904.

The previous prime is 2156225723. The next prime is 2156225749. The reversal of 2156225748 is 8475226512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156225749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269940 + ... + 277812.

It is an arithmetic number, because the mean of its divisors is an integer number (108582460).

Almost surely, 2^2156225748 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 2156225748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2605979040).

2156225748 is an abundant number, since it is smaller than the sum of its proper divisors (3055732332).

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

2156225748 is a wasteful number, since it uses less digits than its factorization.

2156225748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8696 (or 8694 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 2156225748 is about 46435.1779150247. The cubic root of 2156225748 is about 1291.9074695624.

The spelling of 2156225748 in words is "two billion, one hundred fifty-six million, two hundred twenty-five thousand, seven hundred forty-eight".