31143429 has 6 divisors (see below), whose sum is σ = 44984966. Its totient is φ = 20762280.

The previous prime is 31143407. The next prime is 31143433. The reversal of 31143429 is 92434113.

31143429 is a `hidden beast` number, since 311 + 4 + 342 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24502500 + 6640929 = 4950^2 + 2577^2 .

It is not a de Polignac number, because 31143429 - 2¹⁵ = 31110661 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 (31143029) 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 5 ways as a sum of consecutive naturals, for example, 1730182 + ... + 1730199.

Almost surely, 2^31143429 is an apocalyptic number.

It is an amenable number.

31143429 is a deficient number, since it is larger than the sum of its proper divisors (13841537).

31143429 is a wasteful number, since it uses less digits than its factorization.

31143429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460387 (or 3460384 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 31143429 is about 5580.6298031674. The cubic root of 31143429 is about 314.6217985547.

The spelling of 31143429 in words is "thirty-one million, one hundred forty-three thousand, four hundred twenty-nine".