2145640343 has 16 divisors (see below), whose sum is σ = 2692137984. Its totient is φ = 1661268960.

The previous prime is 2145640339. The next prime is 2145640403. The reversal of 2145640343 is 3430465412.

It is a cyclic number.

It is not a de Polignac number, because 2145640343 - 2² = 2145640339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145640543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76655 + ... + 100832.

It is an arithmetic number, because the mean of its divisors is an integer number (168258624).

Almost surely, 2^2145640343 is an apocalyptic number.

2145640343 is a deficient number, since it is larger than the sum of its proper divisors (546497641).

2145640343 is a wasteful number, since it uses less digits than its factorization.

2145640343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177662.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 2145640343 is about 46321.0572310262. The cubic root of 2145640343 is about 1289.7899109023.

The spelling of 2145640343 in words is "two billion, one hundred forty-five million, six hundred forty thousand, three hundred forty-three".