31429085 has 8 divisors (see below), whose sum is σ = 37911480. Its totient is φ = 25012224.

The previous prime is 31429081. The next prime is 31429103. The reversal of 31429085 is 58092413.

It can be written as a sum of positive squares in 4 ways, for example, as 7409284 + 24019801 = 2722^2 + 4901^2 .

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 31429085 - 2² = 31429081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31429081) 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 7 ways as a sum of consecutive naturals, for example, 15320 + ... + 17249.

It is an arithmetic number, because the mean of its divisors is an integer number (4738935).

Almost surely, 2^31429085 is an apocalyptic number.

It is an amenable number.

31429085 is a deficient number, since it is larger than the sum of its proper divisors (6482395).

31429085 is a wasteful number, since it uses less digits than its factorization.

31429085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32767.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 31429085 is about 5606.1649101681. The cubic root of 31429085 is about 315.5808046474.

The spelling of 31429085 in words is "thirty-one million, four hundred twenty-nine thousand, eighty-five".