31225142 has 16 divisors (see below), whose sum is σ = 50600592. Its totient is φ = 14365920.

The previous prime is 31225133. The next prime is 31225147. The reversal of 31225142 is 24152213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225147) 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, 7292 + ... + 10752.

It is an arithmetic number, because the mean of its divisors is an integer number (3162537).

Almost surely, 2^31225142 is an apocalyptic number.

31225142 is a deficient number, since it is larger than the sum of its proper divisors (19375450).

31225142 is a wasteful number, since it uses less digits than its factorization.

31225142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823.

The product of its digits is 480, while the sum is 20.

The square root of 31225142 is about 5587.9461343145. The cubic root of 31225142 is about 314.8967226725.

Adding to 31225142 its reverse (24152213), we get a palindrome (55377355).

The spelling of 31225142 in words is "thirty-one million, two hundred twenty-five thousand, one hundred forty-two".