31111029 has 6 divisors (see below), whose sum is σ = 44938166. Its totient is φ = 20740680.

The previous prime is 31111013. The next prime is 31111057. The reversal of 31111029 is 92011113.

It can be written as a sum of positive squares in only one way, i.e., 31102929 + 8100 = 5577^2 + 90^2 .

It is not a de Polignac number, because 31111029 - 2⁴ = 31111013 is a prime.

It is a super-2 number, since 2×31111029² = 1935792250877682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111009) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1728382 + ... + 1728399.

Almost surely, 2^31111029 is an apocalyptic number.

It is an amenable number.

31111029 is a deficient number, since it is larger than the sum of its proper divisors (13827137).

31111029 is a wasteful number, since it uses less digits than its factorization.

31111029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456787 (or 3456784 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 31111029 is about 5577.7261496061. The cubic root of 31111029 is about 314.5126553244.

The spelling of 31111029 in words is "thirty-one million, one hundred eleven thousand, twenty-nine".