36331381 has 4 divisors (see below), whose sum is σ = 36377100. Its totient is φ = 36285664.

The previous prime is 36331369. The next prime is 36331387. The reversal of 36331381 is 18313363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18313363 = 449 ⋅40787.

It can be written as a sum of positive squares in 2 ways, for example, as 19439281 + 16892100 = 4409^2 + 4110^2 .

It is a cyclic number.

It is not a de Polignac number, because 36331381 - 2¹¹ = 36329333 is a prime.

It is a super-2 number, since 2×36331381² = 2639938490734322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36331387) 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, 21646 + ... + 23263.

It is an arithmetic number, because the mean of its divisors is an integer number (9094275).

Almost surely, 2^36331381 is an apocalyptic number.

It is an amenable number.

36331381 is a deficient number, since it is larger than the sum of its proper divisors (45719).

36331381 is an equidigital number, since it uses as much as digits as its factorization.

36331381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45718.

The product of its digits is 3888, while the sum is 28.

The square root of 36331381 is about 6027.5518247461. The cubic root of 36331381 is about 331.2027764174.

The spelling of 36331381 in words is "thirty-six million, three hundred thirty-one thousand, three hundred eighty-one".