2145442997 has 8 divisors (see below), whose sum is σ = 2250685440. Its totient is φ = 2042284720.

The previous prime is 2145442987. The next prime is 2145443023. The reversal of 2145442997 is 7992445412.

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 not a de Polignac number, because 2145442997 - 2¹² = 2145438901 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 (2145442907) 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, 518933 + ... + 523050.

It is an arithmetic number, because the mean of its divisors is an integer number (281335680).

Almost surely, 2^2145442997 is an apocalyptic number.

It is an amenable number.

2145442997 is a deficient number, since it is larger than the sum of its proper divisors (105242443).

2145442997 is a wasteful number, since it uses less digits than its factorization.

2145442997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042083.

The product of its digits is 725760, while the sum is 47.

The square root of 2145442997 is about 46318.9269845492. The cubic root of 2145442997 is about 1289.7503667347.

The spelling of 2145442997 in words is "two billion, one hundred forty-five million, four hundred forty-two thousand, nine hundred ninety-seven".