2158471800 has 288 divisors, whose sum is σ = 7848247680. Its totient is φ = 550281600.

The previous prime is 2158471787. The next prime is 2158471829. The reversal of 2158471800 is 81748512.

2158471800 is a `hidden beast` number, since 2 + 1 + 584 + 71 + 8 + 0 + 0 = 666.

It is a super-2 number, since 2×2158471800² = 9318001022790480000, which contains 22 as substring.

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 polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1116835 + ... + 1118765.

It is an arithmetic number, because the mean of its divisors is an integer number (27250860).

Almost surely, 2^2158471800 is an apocalyptic number.

2158471800 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 2158471800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3924123840).

2158471800 is an abundant number, since it is smaller than the sum of its proper divisors (5689775880).

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

2158471800 is a wasteful number, since it uses less digits than its factorization.

2158471800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985 (or 1964 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 2158471800 is about 46459.3564311862. The cubic root of 2158471800 is about 1292.3558895878.

The spelling of 2158471800 in words is "two billion, one hundred fifty-eight million, four hundred seventy-one thousand, eight hundred".