2190500465 has 4 divisors (see below), whose sum is σ = 2628600564. Its totient is φ = 1752400368.

The previous prime is 2190500461. The next prime is 2190500467. The reversal of 2190500465 is 5640050912.

It is a happy number.

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 1077677584 + 1112822881 = 32828^2 + 33359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190500465 - 2² = 2190500461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2190500461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219050042 + ... + 219050051.

It is an arithmetic number, because the mean of its divisors is an integer number (657150141).

Almost surely, 2^2190500465 is an apocalyptic number.

It is an amenable number.

2190500465 is a deficient number, since it is larger than the sum of its proper divisors (438100099).

2190500465 is an equidigital number, since it uses as much as digits as its factorization.

2190500465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438100098.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2190500465 is about 46802.7826629999. The cubic root of 2190500465 is about 1298.7167741826.

The spelling of 2190500465 in words is "two billion, one hundred ninety million, five hundred thousand, four hundred sixty-five".