2145532001 has 4 divisors (see below), whose sum is σ = 2148788400. Its totient is φ = 2142275604.

The previous prime is 2145531959. The next prime is 2145532019. The reversal of 2145532001 is 1002355412.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145532001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2145532021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627211 + ... + 1628528.

It is an arithmetic number, because the mean of its divisors is an integer number (537197100).

Almost surely, 2^2145532001 is an apocalyptic number.

It is an amenable number.

2145532001 is a deficient number, since it is larger than the sum of its proper divisors (3256399).

2145532001 is an equidigital number, since it uses as much as digits as its factorization.

2145532001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256398.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2145532001 is about 46319.8877481369. The cubic root of 2145532001 is about 1289.7682016456.

Adding to 2145532001 its reverse (1002355412), we get a palindrome (3147887413).

The spelling of 2145532001 in words is "two billion, one hundred forty-five million, five hundred thirty-two thousand, one".