2130125784 has 24 divisors (see below), whose sum is σ = 5325879780. Its totient is φ = 709966560.

The previous prime is 2130125729. The next prime is 2130125791. The reversal of 2130125784 is 4875210312.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×2130125784² = 9074871711323229312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221394 + ... + 230814.

Almost surely, 2^2130125784 is an apocalyptic number.

2130125784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2130125784 is an abundant number, since it is smaller than the sum of its proper divisors (3195753996).

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

2130125784 is an frugal number, since it uses more digits than its factorization.

2130125784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18851 (or 9426 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 2130125784 is about 46153.2857335206. The cubic root of 2130125784 is about 1286.6736777637.

The spelling of 2130125784 in words is "two billion, one hundred thirty million, one hundred twenty-five thousand, seven hundred eighty-four".