2125521239 has 4 divisors (see below), whose sum is σ = 2125819824. Its totient is φ = 2125222656.

The previous prime is 2125521227. The next prime is 2125521247. The reversal of 2125521239 is 9321255212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2125521239 - 2²⁴ = 2108744023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125521269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138347 + ... + 152940.

It is an arithmetic number, because the mean of its divisors is an integer number (531454956).

Almost surely, 2^2125521239 is an apocalyptic number.

2125521239 is a deficient number, since it is larger than the sum of its proper divisors (298585).

2125521239 is an equidigital number, since it uses as much as digits as its factorization.

2125521239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298584.

The product of its digits is 10800, while the sum is 32.

The square root of 2125521239 is about 46103.3755705588. The cubic root of 2125521239 is about 1285.7459045587.

The spelling of 2125521239 in words is "two billion, one hundred twenty-five million, five hundred twenty-one thousand, two hundred thirty-nine".