2145140545 has 8 divisors (see below), whose sum is σ = 2574444096. Its totient is φ = 1715928816.

The previous prime is 2145140509. The next prime is 2145140549. The reversal of 2145140545 is 5450415412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145140545 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145140549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48894 + ... + 81736.

It is an arithmetic number, because the mean of its divisors is an integer number (321805512).

Almost surely, 2^2145140545 is an apocalyptic number.

It is an amenable number.

2145140545 is a deficient number, since it is larger than the sum of its proper divisors (429303551).

2145140545 is a wasteful number, since it uses less digits than its factorization.

2145140545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45911.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 2145140545 is about 46315.6619838257. The cubic root of 2145140545 is about 1289.6897567332.

Adding to 2145140545 its reverse (5450415412), we get a palindrome (7595555957).

The spelling of 2145140545 in words is "two billion, one hundred forty-five million, one hundred forty thousand, five hundred forty-five".