31224342 has 16 divisors (see below), whose sum is σ = 66122352. Its totient is φ = 9795840.

The previous prime is 31224341. The next prime is 31224343. The reversal of 31224342 is 24342213.

It is an interprime number because it is at equal distance from previous prime (31224341) and next prime (31224343).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224341) 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 7 ways as a sum of consecutive naturals, for example, 152959 + ... + 153162.

It is an arithmetic number, because the mean of its divisors is an integer number (4132647).

Almost surely, 2^31224342 is an apocalyptic number.

31224342 is an abundant number, since it is smaller than the sum of its proper divisors (34898010).

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

31224342 is a wasteful number, since it uses less digits than its factorization.

31224342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306143.

The product of its digits is 1152, while the sum is 21.

The square root of 31224342 is about 5587.8745512046. The cubic root of 31224342 is about 314.8940333916.

Adding to 31224342 its reverse (24342213), we get a palindrome (55566555).

The spelling of 31224342 in words is "thirty-one million, two hundred twenty-four thousand, three hundred forty-two".