31322013 has 8 divisors (see below), whose sum is σ = 43960800. Its totient is φ = 19782288.

The previous prime is 31321987. The next prime is 31322023. The reversal of 31322013 is 31022313.

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

It is not a de Polignac number, because 31322013 - 2⁵ = 31321981 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31321983 and 31322001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274698 + ... + 274811.

It is an arithmetic number, because the mean of its divisors is an integer number (5495100).

Almost surely, 2^31322013 is an apocalyptic number.

It is an amenable number.

31322013 is a deficient number, since it is larger than the sum of its proper divisors (12638787).

31322013 is a wasteful number, since it uses less digits than its factorization.

31322013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549531.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31322013 is about 5596.6072758413. The cubic root of 31322013 is about 315.2220253801. Note that the first 3 decimals are identical.

Adding to 31322013 its reverse (31022313), we get a palindrome (62344326).

The spelling of 31322013 in words is "thirty-one million, three hundred twenty-two thousand, thirteen".