36391231 has 8 divisors (see below), whose sum is σ = 37984464. Its totient is φ = 34831680.

The previous prime is 36391211. The next prime is 36391249. The reversal of 36391231 is 13219363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36391231 is a prime.

It is a super-2 number, since 2×36391231² = 2648643387390722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 36391231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36391211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6201 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (4748058).

Almost surely, 2^36391231 is an apocalyptic number.

36391231 is a deficient number, since it is larger than the sum of its proper divisors (1593233).

36391231 is a wasteful number, since it uses less digits than its factorization.

36391231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841.

The product of its digits is 2916, while the sum is 28.

The square root of 36391231 is about 6032.5144840274. The cubic root of 36391231 is about 331.3845440869.

The spelling of 36391231 in words is "thirty-six million, three hundred ninety-one thousand, two hundred thirty-one".