31123030 has 8 divisors (see below), whose sum is σ = 56021472. Its totient is φ = 12449208.

The previous prime is 31123021. The next prime is 31123067. The reversal of 31123030 is 3032113.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31123030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556142 + ... + 1556161.

It is an arithmetic number, because the mean of its divisors is an integer number (7002684).

Almost surely, 2^31123030 is an apocalyptic number.

31123030 is a deficient number, since it is larger than the sum of its proper divisors (24898442).

31123030 is a wasteful number, since it uses less digits than its factorization.

31123030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112310.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 31123030 is about 5578.8018426899. The cubic root of 31123030 is about 314.5530909434.

Adding to 31123030 its reverse (3032113), we get a palindrome (34155143).

The spelling of 31123030 in words is "thirty-one million, one hundred twenty-three thousand, thirty".