2166520503 has 16 divisors (see below), whose sum is σ = 3338461440. Its totient is φ = 1224100416.

The previous prime is 2166520501. The next prime is 2166520547. The reversal of 2166520503 is 3050256612.

It is not a de Polignac number, because 2166520503 - 2¹ = 2166520501 is a prime.

It is a super-2 number, since 2×2166520503² = 9387622179838746018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166520501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577725 + ... + 581462.

It is an arithmetic number, because the mean of its divisors is an integer number (208653840).

Almost surely, 2^2166520503 is an apocalyptic number.

2166520503 is a deficient number, since it is larger than the sum of its proper divisors (1171940937).

2166520503 is a wasteful number, since it uses less digits than its factorization.

2166520503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159286.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2166520503 is about 46545.8967364471. The cubic root of 2166520503 is about 1293.9602478816.

The spelling of 2166520503 in words is "two billion, one hundred sixty-six million, five hundred twenty thousand, five hundred three".