31025142 has 12 divisors (see below), whose sum is σ = 67221180. Its totient is φ = 10341708.

The previous prime is 31025063. The next prime is 31025143. The reversal of 31025142 is 24152013.

It is a super-2 number, since 2×31025142² = 1925118872240328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1723619 = 31025142 / (3 + 1 + 0 + 2 + 5 + 1 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31025143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 861792 + ... + 861827.

It is an arithmetic number, because the mean of its divisors is an integer number (5601765).

Almost surely, 2^31025142 is an apocalyptic number.

31025142 is an abundant number, since it is smaller than the sum of its proper divisors (36196038).

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

31025142 is a wasteful number, since it uses less digits than its factorization.

31025142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723627 (or 1723624 counting only the distinct ones).

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

The square root of 31025142 is about 5570.0217234765. The cubic root of 31025142 is about 314.2229676585. Note that the first 3 decimals are identical.

Adding to 31025142 its reverse (24152013), we get a palindrome (55177155).

It can be divided in two parts, 310 and 25142, that added together give a palindrome (25452).

The spelling of 31025142 in words is "thirty-one million, twenty-five thousand, one hundred forty-two".