31155104 has 12 divisors (see below), whose sum is σ = 61336674. Its totient is φ = 15577536.

The previous prime is 31155053. The next prime is 31155109. The reversal of 31155104 is 40155113.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 12250000 = 4348^2 + 3500^2 .

It is not an unprimeable number, because it can be changed into a prime (31155109) 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 as a sum of consecutive naturals, namely, 486767 + ... + 486830.

Almost surely, 2^31155104 is an apocalyptic number.

It is an amenable number.

31155104 is a deficient number, since it is larger than the sum of its proper divisors (30181570).

31155104 is an equidigital number, since it uses as much as digits as its factorization.

31155104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973607 (or 973599 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 31155104 is about 5581.6757340426. The cubic root of 31155104 is about 314.6611086190.

Subtracting 31155104 from its reverse (40155113), we obtain a palindrome (9000009).

The spelling of 31155104 in words is "thirty-one million, one hundred fifty-five thousand, one hundred four".