2173236500 has 48 divisors (see below), whose sum is σ = 4795386960. Its totient is φ = 860313600.

The previous prime is 2173236491. The next prime is 2173236509. The reversal of 2173236500 is 56323712.

It is an interprime number because it is at equal distance from previous prime (2173236491) and next prime (2173236509).

It can be written as a sum of positive squares in 8 ways, for example, as 547372816 + 1625863684 = 23396^2 + 40322^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173236509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26096 + ... + 70904.

It is an arithmetic number, because the mean of its divisors is an integer number (99903895).

Almost surely, 2^2173236500 is an apocalyptic number.

2173236500 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 2173236500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2397693480).

2173236500 is an abundant number, since it is smaller than the sum of its proper divisors (2622150460).

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

2173236500 is a wasteful number, since it uses less digits than its factorization.

2173236500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44925 (or 44913 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 2173236500 is about 46617.9847269270. The cubic root of 2173236500 is about 1295.2959178257.

The spelling of 2173236500 in words is "two billion, one hundred seventy-three million, two hundred thirty-six thousand, five hundred".