36551521 has 4 divisors (see below), whose sum is σ = 36893232. Its totient is φ = 36209812.

The previous prime is 36551491. The next prime is 36551527. The reversal of 36551521 is 12515563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36551521 - 2¹³ = 36543329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36551521.

It is not an unprimeable number, because it can be changed into a prime (36551527) 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, 170695 + ... + 170908.

It is an arithmetic number, because the mean of its divisors is an integer number (9223308).

Almost surely, 2^36551521 is an apocalyptic number.

It is an amenable number.

36551521 is a deficient number, since it is larger than the sum of its proper divisors (341711).

36551521 is a wasteful number, since it uses less digits than its factorization.

36551521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341710.

The product of its digits is 4500, while the sum is 28.

The square root of 36551521 is about 6045.7853914938. The cubic root of 36551521 is about 331.8703738643.

The spelling of 36551521 in words is "thirty-six million, five hundred fifty-one thousand, five hundred twenty-one".