31100142 has 8 divisors (see below), whose sum is σ = 62200296. Its totient is φ = 10366712.

The previous prime is 31100101. The next prime is 31100149. The reversal of 31100142 is 24100113.

It is a happy number.

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

31100142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2591673 + ... + 2591684.

It is an arithmetic number, because the mean of its divisors is an integer number (7775037).

Almost surely, 2^31100142 is an apocalyptic number.

31100142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31100142 is a wasteful number, since it uses less digits than its factorization.

31100142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183362.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 31100142 is about 5576.7501288833. The cubic root of 31100142 is about 314.4759641693.

Adding to 31100142 its reverse (24100113), we get a palindrome (55200255).

The spelling of 31100142 in words is "thirty-one million, one hundred thousand, one hundred forty-two".