2015125643 has 4 divisors (see below), whose sum is σ = 2080129728. Its totient is φ = 1950121560.

The previous prime is 2015125631. The next prime is 2015125649. The reversal of 2015125643 is 3465215102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465215102 = 2 ⋅1732607551.

It is a cyclic number.

It is not a de Polignac number, because 2015125643 - 2¹⁴ = 2015109259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015125649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32501996 + ... + 32502057.

It is an arithmetic number, because the mean of its divisors is an integer number (520032432).

Almost surely, 2^2015125643 is an apocalyptic number.

2015125643 is a deficient number, since it is larger than the sum of its proper divisors (65004085).

2015125643 is an equidigital number, since it uses as much as digits as its factorization.

2015125643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65004084.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2015125643 is about 44890.1508462603. The cubic root of 2015125643 is about 1263.0892623936.

The spelling of 2015125643 in words is "two billion, fifteen million, one hundred twenty-five thousand, six hundred forty-three".