31214436 has 48 divisors (see below), whose sum is σ = 80377920. Its totient is φ = 9349120.

The previous prime is 31214423. The next prime is 31214437. The reversal of 31214436 is 63441213.

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 (31214437) 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 15 ways as a sum of consecutive naturals, for example, 10420 + ... + 13076.

It is an arithmetic number, because the mean of its divisors is an integer number (1674540).

Almost surely, 2^31214436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31214436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40188960).

31214436 is an abundant number, since it is smaller than the sum of its proper divisors (49163484).

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

31214436 is a wasteful number, since it uses less digits than its factorization.

31214436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2762 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 31214436 is about 5586.9880973562. The cubic root of 31214436 is about 314.8607295649.

Adding to 31214436 its reverse (63441213), we get a palindrome (94655649).

It can be divided in two parts, 3121 and 4436, that added together give a palindrome (7557).

The spelling of 31214436 in words is "thirty-one million, two hundred fourteen thousand, four hundred thirty-six".