31227380 has 24 divisors (see below), whose sum is σ = 65713032. Its totient is φ = 12465152.

The previous prime is 31227379. The next prime is 31227389. The reversal of 31227380 is 8372213.

It can be written as a sum of positive squares in 4 ways, for example, as 1175056 + 30052324 = 1084^2 + 5482^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31227389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10544 + ... + 13176.

It is an arithmetic number, because the mean of its divisors is an integer number (2738043).

Almost surely, 2^31227380 is an apocalyptic number.

It is an amenable number.

31227380 is an abundant number, since it is smaller than the sum of its proper divisors (34485652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31227380 is a wasteful number, since it uses less digits than its factorization.

31227380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235 (or 3233 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 31227380 is about 5588.1463831936. The cubic root of 31227380 is about 314.9042456917.

Adding to 31227380 its reverse (8372213), we get a palindrome (39599593).

The spelling of 31227380 in words is "thirty-one million, two hundred twenty-seven thousand, three hundred eighty".