3506372217 has 12 divisors (see below), whose sum is σ = 5097021540. Its totient is φ = 2322691488.

The previous prime is 3506372209. The next prime is 3506372269. The reversal of 3506372217 is 7122736053.

3506372217 is a `hidden beast` number, since 3 + 5 + 0 + 637 + 2 + 2 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1518193296 + 1988178921 = 38964^2 + 44589^2 .

It is not a de Polignac number, because 3506372217 - 2³ = 3506372209 is a prime.

It is a super-2 number, since 2×3506372217² = 24589292248298990178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3506372297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1239342 + ... + 1242167.

It is an arithmetic number, because the mean of its divisors is an integer number (424751795).

Almost surely, 2^3506372217 is an apocalyptic number.

It is an amenable number.

3506372217 is a deficient number, since it is larger than the sum of its proper divisors (1590649323).

3506372217 is a wasteful number, since it uses less digits than its factorization.

3506372217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481672 (or 2481669 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 3506372217 is about 59214.6284037990. The cubic root of 3506372217 is about 1519.2153465457.

The spelling of 3506372217 in words is "three billion, five hundred six million, three hundred seventy-two thousand, two hundred seventeen".