2145665467 has 4 divisors (see below), whose sum is σ = 2340725976. Its totient is φ = 1950604960.

The previous prime is 2145665447. The next prime is 2145665477. The reversal of 2145665467 is 7645665412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145665467 is a prime.

It is a super-5 number, since 5×2145665467⁵ (a number of 48 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145665447) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 97530238 + ... + 97530259.

It is an arithmetic number, because the mean of its divisors is an integer number (585181494).

Almost surely, 2^2145665467 is an apocalyptic number.

2145665467 is a deficient number, since it is larger than the sum of its proper divisors (195060509).

2145665467 is a wasteful number, since it uses less digits than its factorization.

2145665467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195060508.

The product of its digits is 1209600, while the sum is 46.

The square root of 2145665467 is about 46321.3284243878. The cubic root of 2145665467 is about 1289.7949450724.

Subtracting 2145665467 from its reverse (7645665412), we obtain a palindrome (5499999945).

The spelling of 2145665467 in words is "two billion, one hundred forty-five million, six hundred sixty-five thousand, four hundred sixty-seven".