31143394 has 8 divisors (see below), whose sum is σ = 49173840. Its totient is φ = 14752116.

The previous prime is 31143391. The next prime is 31143407. The reversal of 31143394 is 49334113.

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

It is not an unprimeable number, because it can be changed into a prime (31143391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409744 + ... + 409819.

It is an arithmetic number, because the mean of its divisors is an integer number (6146730).

Almost surely, 2^31143394 is an apocalyptic number.

31143394 is a deficient number, since it is larger than the sum of its proper divisors (18030446).

31143394 is a wasteful number, since it uses less digits than its factorization.

31143394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819584.

The product of its digits is 3888, while the sum is 28.

The square root of 31143394 is about 5580.6266673197. The cubic root of 31143394 is about 314.6216806939.

The spelling of 31143394 in words is "thirty-one million, one hundred forty-three thousand, three hundred ninety-four".