31365142 has 4 divisors (see below), whose sum is σ = 47047716. Its totient is φ = 15682570.

The previous prime is 31365137. The next prime is 31365151. The reversal of 31365142 is 24156313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24156313 = 997 ⋅24229.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7841284 + ... + 7841287.

It is an arithmetic number, because the mean of its divisors is an integer number (11761929).

Almost surely, 2^31365142 is an apocalyptic number.

31365142 is a deficient number, since it is larger than the sum of its proper divisors (15682574).

31365142 is a wasteful number, since it uses less digits than its factorization.

31365142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15682573.

The product of its digits is 2160, while the sum is 25.

The square root of 31365142 is about 5600.4590883248. The cubic root of 31365142 is about 315.3666411972.

The spelling of 31365142 in words is "thirty-one million, three hundred sixty-five thousand, one hundred forty-two".