31123434 has 8 divisors (see below), whose sum is σ = 62246880. Its totient is φ = 10374476.

The previous prime is 31123429. The next prime is 31123451. The reversal of 31123434 is 43432113.

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

31123434 is an admirable number.

It is a super-3 number, since 3×31123434³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31123434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2593614 + ... + 2593625.

It is an arithmetic number, because the mean of its divisors is an integer number (7780860).

Almost surely, 2^31123434 is an apocalyptic number.

31123434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31123434 is a wasteful number, since it uses less digits than its factorization.

31123434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5187244.

The product of its digits is 864, while the sum is 21.

The square root of 31123434 is about 5578.8380510640. The cubic root of 31123434 is about 314.5544519816.

Adding to 31123434 its reverse (43432113), we get a palindrome (74555547).

The spelling of 31123434 in words is "thirty-one million, one hundred twenty-three thousand, four hundred thirty-four".