2145435553 has 4 divisors (see below), whose sum is σ = 2149206660. Its totient is φ = 2141664448.

The previous prime is 2145435527. The next prime is 2145435563. The reversal of 2145435553 is 3555345412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1400855184 + 744580369 = 37428^2 + 27287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145435553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145435563) 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, 1884700 + ... + 1885837.

It is an arithmetic number, because the mean of its divisors is an integer number (537301665).

Almost surely, 2^2145435553 is an apocalyptic number.

It is an amenable number.

2145435553 is a deficient number, since it is larger than the sum of its proper divisors (3771107).

2145435553 is an equidigital number, since it uses as much as digits as its factorization.

2145435553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771106.

The product of its digits is 180000, while the sum is 37.

The square root of 2145435553 is about 46318.8466285593. The cubic root of 2145435553 is about 1289.7488750594.

The spelling of 2145435553 in words is "two billion, one hundred forty-five million, four hundred thirty-five thousand, five hundred fifty-three".