31424244 has 24 divisors (see below), whose sum is σ = 73644480. Its totient is φ = 10428864.

The previous prime is 31424243. The next prime is 31424251. The reversal of 31424244 is 44242413.

It is a happy number.

It is a super-2 number, since 2×31424244² = 1974966221943072, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2824 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (3068520).

Almost surely, 2^31424244 is an apocalyptic number.

It is an amenable number.

31424244 is an abundant number, since it is smaller than the sum of its proper divisors (42220236).

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

31424244 is a wasteful number, since it uses less digits than its factorization.

31424244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11479 (or 11477 counting only the distinct ones).

The product of its digits is 3072, while the sum is 24.

The square root of 31424244 is about 5605.7331367092. The cubic root of 31424244 is about 315.5646009185.

Adding to 31424244 its reverse (44242413), we get a palindrome (75666657).

The spelling of 31424244 in words is "thirty-one million, four hundred twenty-four thousand, two hundred forty-four".