31102142 has 16 divisors (see below), whose sum is σ = 47736000. Its totient is φ = 15194400.

The previous prime is 31102133. The next prime is 31102147. The reversal of 31102142 is 24120113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14984 + ... + 16932.

It is an arithmetic number, because the mean of its divisors is an integer number (2983500).

Almost surely, 2^31102142 is an apocalyptic number.

31102142 is a deficient number, since it is larger than the sum of its proper divisors (16633858).

31102142 is a wasteful number, since it uses less digits than its factorization.

31102142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31102142 is about 5576.9294419062. The cubic root of 31102142 is about 314.4827051723.

Adding to 31102142 its reverse (24120113), we get a palindrome (55222255).

The spelling of 31102142 in words is "thirty-one million, one hundred two thousand, one hundred forty-two".