36551331 has 22 divisors (see below), whose sum is σ = 54915260. Its totient is φ = 24328188.

The previous prime is 36551323. The next prime is 36551341. The reversal of 36551331 is 13315563.

36551331 is a `hidden beast` number, since 3 + 655 + 1 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 36551331 - 2³ = 36551323 is a prime.

It is a super-2 number, since 2×36551331² = 2671999595743122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36551295 and 36551304.

It is not an unprimeable number, because it can be changed into a prime (36551341) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 58740 + ... + 59358.

Almost surely, 2^36551331 is an apocalyptic number.

36551331 is a deficient number, since it is larger than the sum of its proper divisors (18363929).

36551331 is an frugal number, since it uses more digits than its factorization.

36551331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 622 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 36551331 is about 6045.7696780476. The cubic root of 36551331 is about 331.8697988268.

Adding to 36551331 its reverse (13315563), we get a palindrome (49866894).

The spelling of 36551331 in words is "thirty-six million, five hundred fifty-one thousand, three hundred thirty-one".