31145845 has 8 divisors (see below), whose sum is σ = 39342240. Its totient is φ = 23605200.

The previous prime is 31145839. The next prime is 31145857. The reversal of 31145845 is 54854113.

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

It is not a de Polignac number, because 31145845 - 2⁵ = 31145813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163831 + ... + 164020.

It is an arithmetic number, because the mean of its divisors is an integer number (4917780).

Almost surely, 2^31145845 is an apocalyptic number.

It is an amenable number.

31145845 is a deficient number, since it is larger than the sum of its proper divisors (8196395).

31145845 is a wasteful number, since it uses less digits than its factorization.

31145845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327875.

The product of its digits is 9600, while the sum is 31.

The square root of 31145845 is about 5580.8462619929. The cubic root of 31145845 is about 314.6299341029.

Adding to 31145845 its reverse (54854113), we get a palindrome (85999958).

The spelling of 31145845 in words is "thirty-one million, one hundred forty-five thousand, eight hundred forty-five".