31342133 has 6 divisors (see below), whose sum is σ = 31975074. Its totient is φ = 30710784.

The previous prime is 31342121. The next prime is 31342139. The reversal of 31342133 is 33124313.

It can be written as a sum of positive squares in 3 ways, for example, as 4695889 + 26646244 = 2167^2 + 5162^2 .

It is not a de Polignac number, because 31342133 - 2¹² = 31338037 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 (31342139) 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, 40373 + ... + 41141.

It is an arithmetic number, because the mean of its divisors is an integer number (5329179).

Almost surely, 2^31342133 is an apocalyptic number.

It is an amenable number.

31342133 is a deficient number, since it is larger than the sum of its proper divisors (632941).

31342133 is an frugal number, since it uses more digits than its factorization.

31342133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 822 counting only the distinct ones).

The product of its digits is 648, while the sum is 20.

The square root of 31342133 is about 5598.4045048567. The cubic root of 31342133 is about 315.2895062455.

Adding to 31342133 its reverse (33124313), we get a palindrome (64466446).

The spelling of 31342133 in words is "thirty-one million, three hundred forty-two thousand, one hundred thirty-three".