31272230 has 16 divisors (see below), whose sum is σ = 61407504. Its totient is φ = 11371680.

The previous prime is 31272221. The next prime is 31272247. The reversal of 31272230 is 3227213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142037 + ... + 142256.

It is an arithmetic number, because the mean of its divisors is an integer number (3837969).

Almost surely, 2^31272230 is an apocalyptic number.

31272230 is a deficient number, since it is larger than the sum of its proper divisors (30135274).

31272230 is a wasteful number, since it uses less digits than its factorization.

31272230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284311.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 31272230 is about 5592.1579019194. The cubic root of 31272230 is about 315.0549328905.

Adding to 31272230 its reverse (3227213), we get a palindrome (34499443).

The spelling of 31272230 in words is "thirty-one million, two hundred seventy-two thousand, two hundred thirty".