1050215665 has 4 divisors (see below), whose sum is σ = 1260258804. Its totient is φ = 840172528.

The previous prime is 1050215653. The next prime is 1050215669. The reversal of 1050215665 is 5665120501.

1050215665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5665120501 = 23 ⋅246309587.

It can be written as a sum of positive squares in 2 ways, for example, as 619611664 + 430604001 = 24892^2 + 20751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1050215665 is a prime.

It is a super-2 number, since 2×1050215665² = 2205905886022784450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1050215669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105021562 + ... + 105021571.

It is an arithmetic number, because the mean of its divisors is an integer number (315064701).

Almost surely, 2^1050215665 is an apocalyptic number.

It is an amenable number.

1050215665 is a deficient number, since it is larger than the sum of its proper divisors (210043139).

1050215665 is an equidigital number, since it uses as much as digits as its factorization.

1050215665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210043138.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1050215665 is about 32407.0311043761. The cubic root of 1050215665 is about 1016.4659397083.

The spelling of 1050215665 in words is "one billion, fifty million, two hundred fifteen thousand, six hundred sixty-five".