31081030 has 8 divisors (see below), whose sum is σ = 55945872. Its totient is φ = 12432408.

The previous prime is 31081021. The next prime is 31081097. The reversal of 31081030 is 3018013.

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 = 31080995 and 31081013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1554042 + ... + 1554061.

It is an arithmetic number, because the mean of its divisors is an integer number (6993234).

Almost surely, 2^31081030 is an apocalyptic number.

31081030 is a deficient number, since it is larger than the sum of its proper divisors (24864842).

31081030 is a wasteful number, since it uses less digits than its factorization.

31081030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108110.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 31081030 is about 5575.0363227516. The cubic root of 31081030 is about 314.4115325641.

Adding to 31081030 its reverse (3018013), we get a palindrome (34099043).

The spelling of 31081030 in words is "thirty-one million, eighty-one thousand, thirty".