31321429 has 8 divisors (see below), whose sum is σ = 33246720. Its totient is φ = 29405376.

The previous prime is 31321427. The next prime is 31321441. The reversal of 31321429 is 92412313.

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

It is not a de Polignac number, because 31321429 - 2¹ = 31321427 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 (31321427) 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, 5452 + ... + 9610.

It is an arithmetic number, because the mean of its divisors is an integer number (4155840).

Almost surely, 2^31321429 is an apocalyptic number.

It is an amenable number.

31321429 is a deficient number, since it is larger than the sum of its proper divisors (1925291).

31321429 is a wasteful number, since it uses less digits than its factorization.

31321429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619.

The product of its digits is 1296, while the sum is 25.

The square root of 31321429 is about 5596.5551011314. Note that the first 3 decimals coincide. The cubic root of 31321429 is about 315.2200662595.

The spelling of 31321429 in words is "thirty-one million, three hundred twenty-one thousand, four hundred twenty-nine".