2155734100 has 72 divisors (see below), whose sum is σ = 5098736160. Its totient is φ = 786334080.

The previous prime is 2155734037. The next prime is 2155734107. The reversal of 2155734100 is 14375512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155734107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97911 + ... + 117889.

It is an arithmetic number, because the mean of its divisors is an integer number (70815780).

Almost surely, 2^2155734100 is an apocalyptic number.

2155734100 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 2155734100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2549368080).

2155734100 is an abundant number, since it is smaller than the sum of its proper divisors (2943002060).

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

2155734100 is a wasteful number, since it uses less digits than its factorization.

2155734100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20089 (or 20082 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 2155734100 is about 46429.8836957406. The cubic root of 2155734100 is about 1291.8092714330.

The spelling of 2155734100 in words is "two billion, one hundred fifty-five million, seven hundred thirty-four thousand, one hundred".