2156219520 has 768 divisors, whose sum is σ = 9025188480. Its totient is φ = 433520640.

The previous prime is 2156219489. The next prime is 2156219537. The reversal of 2156219520 is 259126512.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50144619 + ... + 50144661.

Almost surely, 2^2156219520 is an apocalyptic number.

2156219520 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 2156219520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4512594240).

2156219520 is an abundant number, since it is smaller than the sum of its proper divisors (6868968960).

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

2156219520 is a wasteful number, since it uses less digits than its factorization.

2156219520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 2156219520 is about 46435.1108537495. The cubic root of 2156219520 is about 1291.9062257212.

The spelling of 2156219520 in words is "two billion, one hundred fifty-six million, two hundred nineteen thousand, five hundred twenty".