31145125 has 16 divisors (see below), whose sum is σ = 42404544. Its totient is φ = 22650000.

The previous prime is 31145113. The next prime is 31145129. The reversal of 31145125 is 52154113.

It is a happy number.

It is not a de Polignac number, because 31145125 - 2⁹ = 31144613 is a prime.

It is a super-2 number, since 2×31145125² = 1940037622531250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31145096 and 31145105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9951 + ... + 12700.

It is an arithmetic number, because the mean of its divisors is an integer number (2650284).

Almost surely, 2^31145125 is an apocalyptic number.

It is an amenable number.

31145125 is a deficient number, since it is larger than the sum of its proper divisors (11259419).

31145125 is a wasteful number, since it uses less digits than its factorization.

31145125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22677 (or 22667 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 31145125 is about 5580.7817552741. The cubic root of 31145125 is about 314.6275096458.

Adding to 31145125 its reverse (52154113), we get a palindrome (83299238).

The spelling of 31145125 in words is "thirty-one million, one hundred forty-five thousand, one hundred twenty-five".