2258721500 has 96 divisors (see below), whose sum is σ = 5653380096. Its totient is φ = 772276800.

The previous prime is 2258721467. The next prime is 2258721503. The reversal of 2258721500 is 51278522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2258721503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1759859 + ... + 1761141.

It is an arithmetic number, because the mean of its divisors is an integer number (58889376).

Almost surely, 2^2258721500 is an apocalyptic number.

2258721500 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 2258721500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2826690048).

2258721500 is an abundant number, since it is smaller than the sum of its proper divisors (3394658596).

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

2258721500 is a wasteful number, since it uses less digits than its factorization.

2258721500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 2258721500 is about 47526.0086689383. The cubic root of 2258721500 is about 1312.0616102029.

The spelling of 2258721500 in words is "two billion, two hundred fifty-eight million, seven hundred twenty-one thousand, five hundred".