31045000 has 80 divisors (see below), whose sum is σ = 83223360. Its totient is φ = 10632000.

The previous prime is 31044977. The next prime is 31045013. The reversal of 31045000 is 54013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34557 + ... + 35443.

It is an arithmetic number, because the mean of its divisors is an integer number (1040292).

Almost surely, 2^31045000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31045000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41611680).

31045000 is an abundant number, since it is smaller than the sum of its proper divisors (52178360).

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

31045000 is an equidigital number, since it uses as much as digits as its factorization.

31045000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 31045000 is about 5571.8040166539. The cubic root of 31045000 is about 314.2899940385.

Adding to 31045000 its reverse (54013), we get a palindrome (31099013).

The spelling of 31045000 in words is "thirty-one million, forty-five thousand".