36651521 has 4 divisors (see below), whose sum is σ = 36803844. Its totient is φ = 36499200.

The previous prime is 36651509. The next prime is 36651529. The reversal of 36651521 is 12515663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18800896 + 17850625 = 4336^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 36651521 - 2⁶ = 36651457 is a prime.

It is a super-2 number, since 2×36651521² = 2686667983226882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36651529) 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, 75800 + ... + 76281.

It is an arithmetic number, because the mean of its divisors is an integer number (9200961).

Almost surely, 2^36651521 is an apocalyptic number.

It is an amenable number.

36651521 is a deficient number, since it is larger than the sum of its proper divisors (152323).

36651521 is a wasteful number, since it uses less digits than its factorization.

36651521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152322.

The product of its digits is 5400, while the sum is 29.

The square root of 36651521 is about 6054.0499667578. The cubic root of 36651521 is about 332.1727490443.

The spelling of 36651521 in words is "thirty-six million, six hundred fifty-one thousand, five hundred twenty-one".