3520213531 has 4 divisors (see below), whose sum is σ = 3522096864. Its totient is φ = 3518330200.

The previous prime is 3520213507. The next prime is 3520213561. The reversal of 3520213531 is 1353120253.

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 3520213531 - 2²⁷ = 3385995803 is a prime.

It is a super-2 number, since 2×3520213531² = 24783806607670975922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3520213496 and 3520213505.

It is not an unprimeable number, because it can be changed into a prime (3520213561) 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, 938860 + ... + 942601.

It is an arithmetic number, because the mean of its divisors is an integer number (880524216).

Almost surely, 2^3520213531 is an apocalyptic number.

3520213531 is a deficient number, since it is larger than the sum of its proper divisors (1883333).

3520213531 is a wasteful number, since it uses less digits than its factorization.

3520213531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883332.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 3520213531 is about 59331.3874016106. The cubic root of 3520213531 is about 1521.2117430857.

Adding to 3520213531 its reverse (1353120253), we get a palindrome (4873333784).

The spelling of 3520213531 in words is "three billion, five hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".