31836133 has 6 divisors (see below), whose sum is σ = 37033926. Its totient is φ = 27288072.

The previous prime is 31836097. The next prime is 31836139. The reversal of 31836133 is 33163813.

It can be written as a sum of positive squares in only one way, i.e., 31832164 + 3969 = 5642^2 + 63^2 .

It is not a de Polignac number, because 31836133 - 2¹³ = 31827941 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 (31836139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324810 + ... + 324907.

It is an arithmetic number, because the mean of its divisors is an integer number (6172321).

Almost surely, 2^31836133 is an apocalyptic number.

It is an amenable number.

31836133 is a deficient number, since it is larger than the sum of its proper divisors (5197793).

31836133 is an equidigital number, since it uses as much as digits as its factorization.

31836133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649731 (or 649724 counting only the distinct ones).

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

The square root of 31836133 is about 5642.3517260093. The cubic root of 31836133 is about 316.9373605363.

Adding to 31836133 its reverse (33163813), we get a palindrome (64999946).

It can be divided in two parts, 3183 and 6133, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 31836133 in words is "thirty-one million, eight hundred thirty-six thousand, one hundred thirty-three".