31154142 has 24 divisors (see below), whose sum is σ = 63687384. Its totient is φ = 10156224.

The previous prime is 31154113. The next prime is 31154153. The reversal of 31154142 is 24145113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99378 + ... + 99690.

It is an arithmetic number, because the mean of its divisors is an integer number (2653641).

Almost surely, 2^31154142 is an apocalyptic number.

31154142 is an abundant number, since it is smaller than the sum of its proper divisors (32533242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31154142 is an equidigital number, since it uses as much as digits as its factorization.

31154142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 371 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 31154142 is about 5581.5895585398. The cubic root of 31154142 is about 314.6578699083.

Adding to 31154142 its reverse (24145113), we get a palindrome (55299255).

The spelling of 31154142 in words is "thirty-one million, one hundred fifty-four thousand, one hundred forty-two".