2143253645 has 16 divisors (see below), whose sum is σ = 2770712112. Its totient is φ = 1582156800.

The previous prime is 2143253621. The next prime is 2143253657. The reversal of 2143253645 is 5463523412.

It can be written as a sum of positive squares in 8 ways, for example, as 16752649 + 2126500996 = 4093^2 + 46114^2 .

It is not a de Polignac number, because 2143253645 - 2²⁰ = 2142205069 is a prime.

It is a super-3 number, since 3×2143253645³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336995 + ... + 343295.

It is an arithmetic number, because the mean of its divisors is an integer number (173169507).

Almost surely, 2^2143253645 is an apocalyptic number.

It is an amenable number.

2143253645 is a deficient number, since it is larger than the sum of its proper divisors (627458467).

2143253645 is a wasteful number, since it uses less digits than its factorization.

2143253645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11552.

The product of its digits is 86400, while the sum is 35.

The square root of 2143253645 is about 46295.2875031574. The cubic root of 2143253645 is about 1289.3115018792.

The spelling of 2143253645 in words is "two billion, one hundred forty-three million, two hundred fifty-three thousand, six hundred forty-five".