36831881 has 4 divisors (see below), whose sum is σ = 36968064. Its totient is φ = 36695700.

The previous prime is 36831869. The next prime is 36831917. The reversal of 36831881 is 18813863.

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 a de Polignac number, because none of the positive numbers 2^k-36831881 is a prime.

It is a super-2 number, since 2×36831881² = 2713174915996322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36831811) 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, 67685 + ... + 68226.

It is an arithmetic number, because the mean of its divisors is an integer number (9242016).

Almost surely, 2^36831881 is an apocalyptic number.

It is an amenable number.

36831881 is a deficient number, since it is larger than the sum of its proper divisors (136183).

36831881 is a wasteful number, since it uses less digits than its factorization.

36831881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136182.

The product of its digits is 27648, while the sum is 38.

The square root of 36831881 is about 6068.9274999789. The cubic root of 36831881 is about 332.7167253092.

The spelling of 36831881 in words is "thirty-six million, eight hundred thirty-one thousand, eight hundred eighty-one".