2145479801 has 4 divisors (see below), whose sum is σ = 2145580032. Its totient is φ = 2145379572.

The previous prime is 2145479783. The next prime is 2145479807. The reversal of 2145479801 is 1089745412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145479801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145479807) 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, 3641 + ... + 65606.

It is an arithmetic number, because the mean of its divisors is an integer number (536395008).

Almost surely, 2^2145479801 is an apocalyptic number.

It is an amenable number.

2145479801 is a deficient number, since it is larger than the sum of its proper divisors (100231).

2145479801 is an equidigital number, since it uses as much as digits as its factorization.

2145479801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100230.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 2145479801 is about 46319.3242718414. The cubic root of 2145479801 is about 1289.7577416997.

The spelling of 2145479801 in words is "two billion, one hundred forty-five million, four hundred seventy-nine thousand, eight hundred one".