31479143 has 8 divisors (see below), whose sum is σ = 33841920. Its totient is φ = 29187000.

The previous prime is 31479131. The next prime is 31479197. The reversal of 31479143 is 34197413.

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

It is not a de Polignac number, because 31479143 - 2⁴ = 31479127 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 (31479743) 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, 16733 + ... + 18518.

It is an arithmetic number, because the mean of its divisors is an integer number (4230240).

Almost surely, 2^31479143 is an apocalyptic number.

31479143 is a deficient number, since it is larger than the sum of its proper divisors (2362777).

31479143 is a wasteful number, since it uses less digits than its factorization.

31479143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35317.

The product of its digits is 9072, while the sum is 32.

The square root of 31479143 is about 5610.6276832454. The cubic root of 31479143 is about 315.7482606240.

The spelling of 31479143 in words is "thirty-one million, four hundred seventy-nine thousand, one hundred forty-three".