2125815243 has 4 divisors (see below), whose sum is σ = 2834420328. Its totient is φ = 1417210160.

The previous prime is 2125815239. The next prime is 2125815257. The reversal of 2125815243 is 3425185212.

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 2125815243 - 2² = 2125815239 is a prime.

It is a super-2 number, since 2×2125815243² = 9038180894742298098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2125815143) 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, 354302538 + ... + 354302543.

It is an arithmetic number, because the mean of its divisors is an integer number (708605082).

Almost surely, 2^2125815243 is an apocalyptic number.

2125815243 is a deficient number, since it is larger than the sum of its proper divisors (708605085).

2125815243 is an equidigital number, since it uses as much as digits as its factorization.

2125815243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708605084.

The product of its digits is 19200, while the sum is 33.

The square root of 2125815243 is about 46106.5639903908. The cubic root of 2125815243 is about 1285.8051836670.

The spelling of 2125815243 in words is "two billion, one hundred twenty-five million, eight hundred fifteen thousand, two hundred forty-three".