31224142 has 8 divisors (see below), whose sum is σ = 47151000. Its totient is φ = 15507144.

The previous prime is 31224113. The next prime is 31224199. The reversal of 31224142 is 24142213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52092 + ... + 52687.

It is an arithmetic number, because the mean of its divisors is an integer number (5893875).

Almost surely, 2^31224142 is an apocalyptic number.

31224142 is a deficient number, since it is larger than the sum of its proper divisors (15926858).

31224142 is a wasteful number, since it uses less digits than its factorization.

31224142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104930.

The product of its digits is 384, while the sum is 19.

The square root of 31224142 is about 5587.8566552838. The cubic root of 31224142 is about 314.8933610643.

Adding to 31224142 its reverse (24142213), we get a palindrome (55366355).

The spelling of 31224142 in words is "thirty-one million, two hundred twenty-four thousand, one hundred forty-two".