31542102 has 64 divisors (see below), whose sum is σ = 72783360. Its totient is φ = 10120032.

The previous prime is 31542083. The next prime is 31542103. The reversal of 31542102 is 20124513.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31542103) 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 31 ways as a sum of consecutive naturals, for example, 294733 + ... + 294839.

It is an arithmetic number, because the mean of its divisors is an integer number (1137240).

Almost surely, 2^31542102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31542102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36391680).

31542102 is an abundant number, since it is smaller than the sum of its proper divisors (41241258).

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

31542102 is a wasteful number, since it uses less digits than its factorization.

31542102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31542102 is about 5616.2355719824. The cubic root of 31542102 is about 315.9586216717.

Adding to 31542102 its reverse (20124513), we get a palindrome (51666615).

The spelling of 31542102 in words is "thirty-one million, five hundred forty-two thousand, one hundred two".