31242671 has 4 divisors (see below), whose sum is σ = 32601072. Its totient is φ = 29884272.

The previous prime is 31242661. The next prime is 31242677. The reversal of 31242671 is 17624213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17624213 = 31 ⋅568523.

It is a cyclic number.

It is not a de Polignac number, because 31242671 - 2¹⁴ = 31226287 is a prime.

It is a super-2 number, since 2×31242671² = 1952208982428482, 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 31242671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679166 + ... + 679211.

It is an arithmetic number, because the mean of its divisors is an integer number (8150268).

Almost surely, 2^31242671 is an apocalyptic number.

31242671 is a deficient number, since it is larger than the sum of its proper divisors (1358401).

31242671 is a wasteful number, since it uses less digits than its factorization.

31242671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358400.

The product of its digits is 2016, while the sum is 26.

The square root of 31242671 is about 5589.5143796219. The cubic root of 31242671 is about 314.9556366515.

Adding to 31242671 its reverse (17624213), we get a palindrome (48866884).

It can be divided in two parts, 31242 and 671, that added together give a palindrome (31913).

The spelling of 31242671 in words is "thirty-one million, two hundred forty-two thousand, six hundred seventy-one".