31429059173 has 4 divisors (see below), whose sum is σ = 31429558380. Its totient is φ = 31428559968.

The previous prime is 31429059071. The next prime is 31429059187. The reversal of 31429059173 is 37195092413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27430646884 + 3998412289 = 165622^2 + 63233^2 .

It is a cyclic number.

It is not a de Polignac number, because 31429059173 - 2⁸ = 31429058917 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 (31429059773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138758 + ... + 286551.

It is an arithmetic number, because the mean of its divisors is an integer number (7857389595).

Almost surely, 2^31429059173 is an apocalyptic number.

It is an amenable number.

31429059173 is a deficient number, since it is larger than the sum of its proper divisors (499207).

31429059173 is an equidigital number, since it uses as much as digits as its factorization.

31429059173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499206.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 31429059173 in words is "thirty-one billion, four hundred twenty-nine million, fifty-nine thousand, one hundred seventy-three".