31404142 has 32 divisors (see below), whose sum is σ = 59710464. Its totient is φ = 12031200.

The previous prime is 31404137. The next prime is 31404161. The reversal of 31404142 is 24140413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7723 + ... + 11065.

It is an arithmetic number, because the mean of its divisors is an integer number (1865952).

Almost surely, 2^31404142 is an apocalyptic number.

31404142 is a deficient number, since it is larger than the sum of its proper divisors (28306322).

31404142 is a wasteful number, since it uses less digits than its factorization.

31404142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 31404142 is about 5603.9398640599. The cubic root of 31404142 is about 315.4972979711.

Adding to 31404142 its reverse (24140413), we get a palindrome (55544555).

The spelling of 31404142 in words is "thirty-one million, four hundred four thousand, one hundred forty-two".