2156245300 has 144 divisors (see below), whose sum is σ = 5414653440. Its totient is φ = 737856000.

The previous prime is 2156245279. The next prime is 2156245313. The reversal of 2156245300 is 35426512.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1260846 + ... + 1262554.

It is an arithmetic number, because the mean of its divisors is an integer number (37601760).

Almost surely, 2^2156245300 is an apocalyptic number.

2156245300 is a gapful number since it is divisible by the number (20) 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 2156245300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2707326720).

2156245300 is an abundant number, since it is smaller than the sum of its proper divisors (3258408140).

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

2156245300 is a wasteful number, since it uses less digits than its factorization.

2156245300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2156245300 is about 46435.3884445904. The cubic root of 2156245300 is about 1291.9113744254.

It can be divided in two parts, 2156 and 245300, that added together give a triangular number (247456 = T₇₀₃).

The spelling of 2156245300 in words is "two billion, one hundred fifty-six million, two hundred forty-five thousand, three hundred".