31400042 has 8 divisors (see below), whose sum is σ = 48102336. Its totient is φ = 15365932.

The previous prime is 31400029. The next prime is 31400053. The reversal of 31400042 is 24000413.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 166928 + ... + 167115.

It is an arithmetic number, because the mean of its divisors is an integer number (6012792).

Almost surely, 2^31400042 is an apocalyptic number.

31400042 is a deficient number, since it is larger than the sum of its proper divisors (16702294).

31400042 is a wasteful number, since it uses less digits than its factorization.

31400042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334092.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31400042 is about 5603.5740380582. The cubic root of 31400042 is about 315.4835673490.

Adding to 31400042 its reverse (24000413), we get a palindrome (55400455).

The spelling of 31400042 in words is "thirty-one million, four hundred thousand, forty-two".