2145429727 has 16 divisors (see below), whose sum is σ = 2522419200. Its totient is φ = 1786638528.

The previous prime is 2145429721. The next prime is 2145429731. The reversal of 2145429727 is 7279245412.

It is a cyclic number.

It is not a de Polignac number, because 2145429727 - 2²⁷ = 2011211999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145429721) 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, 21274 + ... + 68872.

It is an arithmetic number, because the mean of its divisors is an integer number (157651200).

Almost surely, 2^2145429727 is an apocalyptic number.

2145429727 is a deficient number, since it is larger than the sum of its proper divisors (376989473).

2145429727 is a wasteful number, since it uses less digits than its factorization.

2145429727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47790.

The product of its digits is 282240, while the sum is 43.

The square root of 2145429727 is about 46318.7837383496. The cubic root of 2145429727 is about 1289.7477076067.

The spelling of 2145429727 in words is "two billion, one hundred forty-five million, four hundred twenty-nine thousand, seven hundred twenty-seven".