31145119 has 4 divisors (see below), whose sum is σ = 31383000. Its totient is φ = 30907240.

The previous prime is 31145113. The next prime is 31145129. The reversal of 31145119 is 91154113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91154113 = 373 ⋅244381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31145119 is a prime.

It is a super-2 number, since 2×31145119² = 1940036875048322, 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 = 31145093 and 31145102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145113) 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 3 ways as a sum of consecutive naturals, for example, 118744 + ... + 119005.

It is an arithmetic number, because the mean of its divisors is an integer number (7845750).

Almost surely, 2^31145119 is an apocalyptic number.

31145119 is a deficient number, since it is larger than the sum of its proper divisors (237881).

31145119 is a wasteful number, since it uses less digits than its factorization.

31145119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237880.

The product of its digits is 540, while the sum is 25.

The square root of 31145119 is about 5580.7812177150. The cubic root of 31145119 is about 314.6274894418.

The spelling of 31145119 in words is "thirty-one million, one hundred forty-five thousand, one hundred nineteen".