2145342505 has 8 divisors (see below), whose sum is σ = 2574663552. Its totient is φ = 1716105648.

The previous prime is 2145342499. The next prime is 2145342509. The reversal of 2145342505 is 5052435412.

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 2145342505 - 2⁹ = 2145341993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145342509) 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, 74254 + ... + 99016.

It is an arithmetic number, because the mean of its divisors is an integer number (321832944).

Almost surely, 2^2145342505 is an apocalyptic number.

It is an amenable number.

2145342505 is a deficient number, since it is larger than the sum of its proper divisors (429321047).

2145342505 is a wasteful number, since it uses less digits than its factorization.

2145342505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42095.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 2145342505 is about 46317.8421885131. The cubic root of 2145342505 is about 1289.7302292281.

Adding to 2145342505 its reverse (5052435412), we get a palindrome (7197777917).

The spelling of 2145342505 in words is "two billion, one hundred forty-five million, three hundred forty-two thousand, five hundred five".