2102423465 has 4 divisors (see below), whose sum is σ = 2522908164. Its totient is φ = 1681938768.

The previous prime is 2102423459. The next prime is 2102423483. The reversal of 2102423465 is 5643242012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1583084944 + 519338521 = 39788^2 + 22789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102423465 - 2²⁶ = 2035314601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210242342 + ... + 210242351.

It is an arithmetic number, because the mean of its divisors is an integer number (630727041).

Almost surely, 2^2102423465 is an apocalyptic number.

It is an amenable number.

2102423465 is a deficient number, since it is larger than the sum of its proper divisors (420484699).

2102423465 is an equidigital number, since it uses as much as digits as its factorization.

2102423465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420484698.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2102423465 is about 45852.1914961542. The cubic root of 2102423465 is about 1281.0715849445.

Adding to 2102423465 its reverse (5643242012), we get a palindrome (7745665477).

The spelling of 2102423465 in words is "two billion, one hundred two million, four hundred twenty-three thousand, four hundred sixty-five".