2145539975 has 6 divisors (see below), whose sum is σ = 2660469600. Its totient is φ = 1716431960.

The previous prime is 2145539969. The next prime is 2145539987. The reversal of 2145539975 is 5799355412.

It is not a de Polignac number, because 2145539975 - 2⁴ = 2145539959 is a prime.

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, 42910775 + ... + 42910824.

It is an arithmetic number, because the mean of its divisors is an integer number (443411600).

Almost surely, 2^2145539975 is an apocalyptic number.

2145539975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2145539975 is a deficient number, since it is larger than the sum of its proper divisors (514929625).

2145539975 is an equidigital number, since it uses as much as digits as its factorization.

2145539975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85821609 (or 85821604 counting only the distinct ones).

The product of its digits is 1701000, while the sum is 50.

The square root of 2145539975 is about 46319.9738233950. The cubic root of 2145539975 is about 1289.7697994776.

The spelling of 2145539975 in words is "two billion, one hundred forty-five million, five hundred thirty-nine thousand, nine hundred seventy-five".