31105429 has 8 divisors (see below), whose sum is σ = 32964120. Its totient is φ = 29299200.

The previous prime is 31105423. The next prime is 31105457. The reversal of 31105429 is 92450113.

It can be written as a sum of positive squares in 4 ways, for example, as 2500 + 31102929 = 50^2 + 5577^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31105429 - 2¹¹ = 31103381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31105423) 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 in 7 ways as a sum of consecutive naturals, for example, 11892 + ... + 14269.

It is an arithmetic number, because the mean of its divisors is an integer number (4120515).

Almost surely, 2^31105429 is an apocalyptic number.

It is an amenable number.

31105429 is a deficient number, since it is larger than the sum of its proper divisors (1858691).

31105429 is a wasteful number, since it uses less digits than its factorization.

31105429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26231.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 31105429 is about 5577.2241303358. The cubic root of 31105429 is about 314.4937833829.

The spelling of 31105429 in words is "thirty-one million, one hundred five thousand, four hundred twenty-nine".