36521491 has 16 divisors (see below), whose sum is σ = 40449024. Its totient is φ = 32828544.

The previous prime is 36521489. The next prime is 36521509. The reversal of 36521491 is 19412563.

It is a cyclic number.

It is not a de Polignac number, because 36521491 - 2¹ = 36521489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36522491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33826 + ... + 34888.

It is an arithmetic number, because the mean of its divisors is an integer number (2528064).

Almost surely, 2^36521491 is an apocalyptic number.

36521491 is a deficient number, since it is larger than the sum of its proper divisors (3927533).

36521491 is a wasteful number, since it uses less digits than its factorization.

36521491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 6480, while the sum is 31.

The square root of 36521491 is about 6043.3013328809. The cubic root of 36521491 is about 331.7794629381.

The spelling of 36521491 in words is "thirty-six million, five hundred twenty-one thousand, four hundred ninety-one".