31445010 has 40 divisors (see below), whose sum is σ = 84554316. Its totient is φ = 8385120.

The previous prime is 31445009. The next prime is 31445017. The reversal of 31445010 is 1054413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31438449 + 6561 = 5607^2 + 81^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31445017) by changing a digit.

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, 18601 + ... + 20220.

Almost surely, 2^31445010 is an apocalyptic number.

31445010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31445010 is an abundant number, since it is smaller than the sum of its proper divisors (53109306).

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

31445010 is a wasteful number, since it uses less digits than its factorization.

31445010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38840 (or 38831 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31445010 is about 5607.5850417091. The cubic root of 31445010 is about 315.6340968525.

Adding to 31445010 its reverse (1054413), we get a palindrome (32499423).

The spelling of 31445010 in words is "thirty-one million, four hundred forty-five thousand, ten".