31309059 has 4 divisors (see below), whose sum is σ = 41745416. Its totient is φ = 20872704.

The previous prime is 31309037. The next prime is 31309063. The reversal of 31309059 is 95090313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95090313 = 3 ⋅31696771.

It is not a de Polignac number, because 31309059 - 2⁹ = 31308547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31309079) 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, 5218174 + ... + 5218179.

It is an arithmetic number, because the mean of its divisors is an integer number (10436354).

Almost surely, 2^31309059 is an apocalyptic number.

31309059 is a deficient number, since it is larger than the sum of its proper divisors (10436357).

31309059 is a wasteful number, since it uses less digits than its factorization.

31309059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10436356.

The product of its (nonzero) digits is 3645, while the sum is 30.

The square root of 31309059 is about 5595.4498478675. The cubic root of 31309059 is about 315.1785634100.

The spelling of 31309059 in words is "thirty-one million, three hundred nine thousand, fifty-nine".