31145018 has 8 divisors (see below), whose sum is σ = 48224640. Its totient is φ = 15070140.

The previous prime is 31145011. The next prime is 31145027. The reversal of 31145018 is 81054113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31144984 and 31145002.

It is not an unprimeable number, because it can be changed into a prime (31145011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251108 + ... + 251231.

It is an arithmetic number, because the mean of its divisors is an integer number (6028080).

Almost surely, 2^31145018 is an apocalyptic number.

31145018 is a deficient number, since it is larger than the sum of its proper divisors (17079622).

31145018 is a wasteful number, since it uses less digits than its factorization.

31145018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502372.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 31145018 is about 5580.7721687953. The cubic root of 31145018 is about 314.6271493414.

The spelling of 31145018 in words is "thirty-one million, one hundred forty-five thousand, eighteen".