31268361 has 4 divisors (see below), whose sum is σ = 41691152. Its totient is φ = 20845572.

The previous prime is 31268359. The next prime is 31268371. The reversal of 31268361 is 16386213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16386213 = 3 ⋅5462071.

It is not a de Polignac number, because 31268361 - 2¹ = 31268359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31268371) 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 3 ways as a sum of consecutive naturals, for example, 5211391 + ... + 5211396.

It is an arithmetic number, because the mean of its divisors is an integer number (10422788).

Almost surely, 2^31268361 is an apocalyptic number.

It is an amenable number.

31268361 is a deficient number, since it is larger than the sum of its proper divisors (10422791).

31268361 is a wasteful number, since it uses less digits than its factorization.

31268361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10422790.

The product of its digits is 5184, while the sum is 30.

The square root of 31268361 is about 5591.8119603578. The cubic root of 31268361 is about 315.0419394902.

It can be divided in two parts, 3 and 1268361, that multiplied together give a palindrome (3805083).

The spelling of 31268361 in words is "thirty-one million, two hundred sixty-eight thousand, three hundred sixty-one".