31143201 has 8 divisors (see below), whose sum is σ = 43966944. Its totient is φ = 19540800.

The previous prime is 31143199. The next prime is 31143239. The reversal of 31143201 is 10234113.

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

It is not a de Polignac number, because 31143201 - 2¹ = 31143199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31143241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 305275 + ... + 305376.

It is an arithmetic number, because the mean of its divisors is an integer number (5495868).

Almost surely, 2^31143201 is an apocalyptic number.

It is an amenable number.

31143201 is a deficient number, since it is larger than the sum of its proper divisors (12823743).

31143201 is a wasteful number, since it uses less digits than its factorization.

31143201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610671.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31143201 is about 5580.6093753281. The cubic root of 31143201 is about 314.6210307742.

Adding to 31143201 its reverse (10234113), we get a palindrome (41377314).

The spelling of 31143201 in words is "thirty-one million, one hundred forty-three thousand, two hundred one".