32531213 has 12 divisors (see below), whose sum is σ = 38509884. Its totient is φ = 27297600.

The previous prime is 32531179. The next prime is 32531221. The reversal of 32531213 is 31213523.

It can be written as a sum of positive squares in 2 ways, for example, as 3833764 + 28697449 = 1958^2 + 5357^2 .

It is not a de Polignac number, because 32531213 - 2¹⁰ = 32530189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32531293) 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, 8768 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (3209157).

Almost surely, 2^32531213 is an apocalyptic number.

It is an amenable number.

32531213 is a deficient number, since it is larger than the sum of its proper divisors (5978671).

32531213 is a wasteful number, since it uses less digits than its factorization.

32531213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20716 (or 20705 counting only the distinct ones).

The product of its digits is 540, while the sum is 20.

The square root of 32531213 is about 5703.6140297184. The cubic root of 32531213 is about 319.2273448736.

Adding to 32531213 its reverse (31213523), we get a palindrome (63744736).

It can be divided in two parts, 325 and 31213, that multiplied together give a square (10144225 = 3185²).

The spelling of 32531213 in words is "thirty-two million, five hundred thirty-one thousand, two hundred thirteen".