36551421 has 12 divisors (see below), whose sum is σ = 55575520. Its totient is φ = 23085000.

The previous prime is 36551407. The next prime is 36551441. The reversal of 36551421 is 12415563.

36551421 is a `hidden beast` number, since 3 + 655 + 1 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 36551421 - 2⁷ = 36551293 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 (36551441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106705 + ... + 107046.

Almost surely, 2^36551421 is an apocalyptic number.

It is an amenable number.

36551421 is a deficient number, since it is larger than the sum of its proper divisors (19024099).

36551421 is a wasteful number, since it uses less digits than its factorization.

36551421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213776 (or 213773 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 36551421 is about 6045.7771212641. Note that the first 3 decimals coincide. The cubic root of 36551421 is about 331.8700712133.

Adding to 36551421 its reverse (12415563), we get a palindrome (48966984).

The spelling of 36551421 in words is "thirty-six million, five hundred fifty-one thousand, four hundred twenty-one".