36551491 has 2 divisors, whose sum is σ = 36551492. Its totient is φ = 36551490.

The previous prime is 36551467. The next prime is 36551527. The reversal of 36551491 is 19415563.

It is a weak prime.

It is an emirp because it is prime and its reverse (19415563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36551491 - 2⁷ = 36551363 is a prime.

It is a super-2 number, since 2×36551491² = 2672022988646162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36551441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18275745 + 18275746.

It is an arithmetic number, because the mean of its divisors is an integer number (18275746).

Almost surely, 2^36551491 is an apocalyptic number.

36551491 is a deficient number, since it is larger than the sum of its proper divisors (1).

36551491 is an equidigital number, since it uses as much as digits as its factorization.

36551491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The square root of 36551491 is about 6045.7829104261. The cubic root of 36551491 is about 331.8702830690.

The spelling of 36551491 in words is "thirty-six million, five hundred fifty-one thousand, four hundred ninety-one".