31143146 has 8 divisors (see below), whose sum is σ = 47024544. Its totient is φ = 15468300.

The previous prime is 31143113. The next prime is 31143157. The reversal of 31143146 is 64134113.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51260 + ... + 51863.

It is an arithmetic number, because the mean of its divisors is an integer number (5878068).

Almost surely, 2^31143146 is an apocalyptic number.

31143146 is a deficient number, since it is larger than the sum of its proper divisors (15881398).

31143146 is a wasteful number, since it uses less digits than its factorization.

31143146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103276.

The product of its digits is 864, while the sum is 23.

The square root of 31143146 is about 5580.6044475487. The cubic root of 31143146 is about 314.6208455635.

Adding to 31143146 its reverse (64134113), we get a palindrome (95277259).

The spelling of 31143146 in words is "thirty-one million, one hundred forty-three thousand, one hundred forty-six".