31481230 has 32 divisors (see below), whose sum is σ = 62298720. Its totient is φ = 11358720.

The previous prime is 31481207. The next prime is 31481231. The reversal of 31481230 is 3218413.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31481231) 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 15 ways as a sum of consecutive naturals, for example, 14026 + ... + 16114.

It is an arithmetic number, because the mean of its divisors is an integer number (1946835).

Almost surely, 2^31481230 is an apocalyptic number.

31481230 is a deficient number, since it is larger than the sum of its proper divisors (30817490).

31481230 is a wasteful number, since it uses less digits than its factorization.

31481230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 31481230 is about 5610.8136664837. The cubic root of 31481230 is about 315.7552382818.

Adding to 31481230 its reverse (3218413), we get a palindrome (34699643).

The spelling of 31481230 in words is "thirty-one million, four hundred eighty-one thousand, two hundred thirty".