36521213 has 4 divisors (see below), whose sum is σ = 36856380. Its totient is φ = 36186048.

The previous prime is 36521203. The next prime is 36521227. The reversal of 36521213 is 31212563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31212563 = 97 ⋅321779.

It can be written as a sum of positive squares in 2 ways, for example, as 25775929 + 10745284 = 5077^2 + 3278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36521213 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 (36521203) 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, 167420 + ... + 167637.

It is an arithmetic number, because the mean of its divisors is an integer number (9214095).

Almost surely, 2^36521213 is an apocalyptic number.

It is an amenable number.

36521213 is a deficient number, since it is larger than the sum of its proper divisors (335167).

36521213 is a wasteful number, since it uses less digits than its factorization.

36521213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335166.

The product of its digits is 1080, while the sum is 23.

The square root of 36521213 is about 6043.2783321638. The cubic root of 36521213 is about 331.7786211057.

Adding to 36521213 its reverse (31212563), we get a palindrome (67733776).

The spelling of 36521213 in words is "thirty-six million, five hundred twenty-one thousand, two hundred thirteen".