31226436 has 18 divisors (see below), whose sum is σ = 78933582. Its totient is φ = 10408800.

The previous prime is 31226431. The next prime is 31226453. The reversal of 31226436 is 63462213.

31226436 is a `hidden beast` number, since 3 + 1 + 226 + 436 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21678336 + 9548100 = 4656^2 + 3090^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31226431) 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 5 ways as a sum of consecutive naturals, for example, 433665 + ... + 433736.

It is an arithmetic number, because the mean of its divisors is an integer number (4385199).

Almost surely, 2^31226436 is an apocalyptic number.

31226436 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31226436 is an abundant number, since it is smaller than the sum of its proper divisors (47707146).

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

31226436 is a wasteful number, since it uses less digits than its factorization.

31226436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867411 (or 867406 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 31226436 is about 5588.0619180535. The cubic root of 31226436 is about 314.9010724870.

Adding to 31226436 its reverse (63462213), we get a palindrome (94688649).

The spelling of 31226436 in words is "thirty-one million, two hundred twenty-six thousand, four hundred thirty-six".