31132243 has 8 divisors (see below), whose sum is σ = 31993920. Its totient is φ = 30275520.

The previous prime is 31132229. The next prime is 31132249. The reversal of 31132243 is 34223113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31132243 - 2²¹ = 29035091 is a prime.

It is a super-2 number, since 2×31132243² = 1938433108422098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31132243.

It is not an unprimeable number, because it can be changed into a prime (31132249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14013 + ... + 16081.

It is an arithmetic number, because the mean of its divisors is an integer number (3999240).

Almost surely, 2^31132243 is an apocalyptic number.

31132243 is a deficient number, since it is larger than the sum of its proper divisors (861677).

31132243 is a wasteful number, since it uses less digits than its factorization.

31132243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477.

The product of its digits is 432, while the sum is 19.

The square root of 31132243 is about 5579.6274965270. The cubic root of 31132243 is about 314.5841257508.

Adding to 31132243 its reverse (34223113), we get a palindrome (65355356).

It can be divided in two parts, 31132 and 243, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 31132243 in words is "thirty-one million, one hundred thirty-two thousand, two hundred forty-three".