42213152665 has 4 divisors (see below), whose sum is σ = 50655783204. Its totient is φ = 33770522128.

The previous prime is 42213152651. The next prime is 42213152689. The reversal of 42213152665 is 56625131224.

42213152665 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.

It can be written as a sum of positive squares in 2 ways, for example, as 31551351129 + 10661801536 = 177627^2 + 103256^2 .

It is a cyclic number.

It is not a de Polignac number, because 42213152665 - 2⁹ = 42213152153 is a prime.

It is a Duffinian 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, 4221315262 + ... + 4221315271.

It is an arithmetic number, because the mean of its divisors is an integer number (12663945801).

Almost surely, 2^42213152665 is an apocalyptic number.

It is an amenable number.

42213152665 is a deficient number, since it is larger than the sum of its proper divisors (8442630539).

42213152665 is an equidigital number, since it uses as much as digits as its factorization.

42213152665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442630538.

The product of its digits is 86400, while the sum is 37.

Adding to 42213152665 its reverse (56625131224), we get a palindrome (98838283889).

The spelling of 42213152665 in words is "forty-two billion, two hundred thirteen million, one hundred fifty-two thousand, six hundred sixty-five".