2125136400 has 120 divisors (see below), whose sum is σ = 6827866560. Its totient is φ = 565009920.

The previous prime is 2125136383. The next prime is 2125136413. The reversal of 2125136400 is 46315212.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428334 + ... + 433266.

It is an arithmetic number, because the mean of its divisors is an integer number (56898888).

Almost surely, 2^2125136400 is an apocalyptic number.

2125136400 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 2125136400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3413933280).

2125136400 is an abundant number, since it is smaller than the sum of its proper divisors (4702730160).

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

2125136400 is a wasteful number, since it uses less digits than its factorization.

2125136400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313 (or 5302 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2125136400 is about 46099.2017284464. The cubic root of 2125136400 is about 1285.6683024119.

The spelling of 2125136400 in words is "two billion, one hundred twenty-five million, one hundred thirty-six thousand, four hundred".