2145231505 has 8 divisors (see below), whose sum is σ = 2686203072. Its totient is φ = 1641568368.

The previous prime is 2145231449. The next prime is 2145231511. The reversal of 2145231505 is 5051325412.

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 2145231505 - 2¹³ = 2145223313 is a prime.

It is a super-3 number, since 3×2145231505³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9326979 + ... + 9327208.

It is an arithmetic number, because the mean of its divisors is an integer number (335775384).

Almost surely, 2^2145231505 is an apocalyptic number.

It is an amenable number.

2145231505 is a deficient number, since it is larger than the sum of its proper divisors (540971567).

2145231505 is a wasteful number, since it uses less digits than its factorization.

2145231505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18654215.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2145231505 is about 46316.6439306649. The cubic root of 2145231505 is about 1289.7079853014.

Adding to 2145231505 its reverse (5051325412), we get a palindrome (7196556917).

The spelling of 2145231505 in words is "two billion, one hundred forty-five million, two hundred thirty-one thousand, five hundred five".