31361392 has 20 divisors (see below), whose sum is σ = 62246016. Its totient is φ = 15297920.

The previous prime is 31361387. The next prime is 31361399. The reversal of 31361392 is 29316313.

It is a self number, because there is not a number n which added to its sum of digits gives 31361392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31361399) 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, 23248 + ... + 24559.

Almost surely, 2^31361392 is an apocalyptic number.

It is an amenable number.

31361392 is a deficient number, since it is larger than the sum of its proper divisors (30884624).

31361392 is a wasteful number, since it uses less digits than its factorization.

31361392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47856 (or 47850 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 31361392 is about 5600.1242843351. The cubic root of 31361392 is about 315.3540723393.

The spelling of 31361392 in words is "thirty-one million, three hundred sixty-one thousand, three hundred ninety-two".