31473813 has 16 divisors (see below), whose sum is σ = 48429056. Its totient is φ = 17809200.

The previous prime is 31473811. The next prime is 31473839. The reversal of 31473813 is 31837413.

It is not a de Polignac number, because 31473813 - 2¹ = 31473811 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31473811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5113 + ... + 9438.

It is an arithmetic number, because the mean of its divisors is an integer number (3026816).

Almost surely, 2^31473813 is an apocalyptic number.

It is an amenable number.

31473813 is a deficient number, since it is larger than the sum of its proper divisors (16955243).

31473813 is a wasteful number, since it uses less digits than its factorization.

31473813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14664.

The product of its digits is 6048, while the sum is 30.

The square root of 31473813 is about 5610.1526717194. The cubic root of 31473813 is about 315.7304389485.

The spelling of 31473813 in words is "thirty-one million, four hundred seventy-three thousand, eight hundred thirteen".