2165254285507 has 4 divisors (see below), whose sum is σ = 2165843794840. Its totient is φ = 2164664776176.

The previous prime is 2165254285489. The next prime is 2165254285529. The reversal of 2165254285507 is 7055824525612.

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

It is a cyclic number.

It is not a de Polignac number, because 2165254285507 - 2¹⁵ = 2165254252739 is a prime.

It is a super-2 number, since 2×2165254285507² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165254285577) 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, 294749157 + ... + 294756502.

It is an arithmetic number, because the mean of its divisors is an integer number (541460948710).

Almost surely, 2^{2165254285507} is an apocalyptic number.

2165254285507 is a deficient number, since it is larger than the sum of its proper divisors (589509333).

2165254285507 is an equidigital number, since it uses as much as digits as its factorization.

2165254285507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589509332.

The product of its (nonzero) digits is 6720000, while the sum is 52.

The spelling of 2165254285507 in words is "two trillion, one hundred sixty-five billion, two hundred fifty-four million, two hundred eighty-five thousand, five hundred seven".