2156019000 has 256 divisors, whose sum is σ = 7044710400. Its totient is φ = 548352000.

The previous prime is 2156018983. The next prime is 2156019001. The reversal of 2156019000 is 9106512.

It is a super-2 number, since 2×2156019000² = 9296835856722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156019001) 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 63 ways as a sum of consecutive naturals, for example, 9020881 + ... + 9021119.

It is an arithmetic number, because the mean of its divisors is an integer number (27518400).

Almost surely, 2^2156019000 is an apocalyptic number.

2156019000 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 2156019000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3522355200).

2156019000 is an abundant number, since it is smaller than the sum of its proper divisors (4888691400).

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

2156019000 is a wasteful number, since it uses less digits than its factorization.

2156019000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 2156019000 is about 46432.9516615087. The cubic root of 2156019000 is about 1291.8661770674.

The spelling of 2156019000 in words is "two billion, one hundred fifty-six million, nineteen thousand".