31301424 has 160 divisors (see below), whose sum is σ = 112135680. Its totient is φ = 8121600.

The previous prime is 31301423. The next prime is 31301443. The reversal of 31301424 is 42410313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31301397 and 31301406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32794 + ... + 33734.

It is an arithmetic number, because the mean of its divisors is an integer number (700848).

Almost surely, 2^31301424 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 31301424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56067840).

31301424 is an abundant number, since it is smaller than the sum of its proper divisors (80834256).

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

31301424 is a wasteful number, since it uses less digits than its factorization.

31301424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31301424 is about 5594.7675554933. The cubic root of 31301424 is about 315.1529416034.

Adding to 31301424 its reverse (42410313), we get a palindrome (73711737).

Subtracting 31301424 from its reverse (42410313), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 3130 and 1424, that added together give a palindrome (4554).

The spelling of 31301424 in words is "thirty-one million, three hundred one thousand, four hundred twenty-four".