31772013 has 16 divisors (see below), whose sum is σ = 52139136. Its totient is φ = 16758720.

The previous prime is 31771973. The next prime is 31772017. The reversal of 31772013 is 31027713.

It is not a de Polignac number, because 31772013 - 2⁸ = 31771757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31772017) 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, 57918 + ... + 58463.

It is an arithmetic number, because the mean of its divisors is an integer number (3258696).

Almost surely, 2^31772013 is an apocalyptic number.

It is an amenable number.

31772013 is a deficient number, since it is larger than the sum of its proper divisors (20367123).

31772013 is a wasteful number, since it uses less digits than its factorization.

31772013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116404.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 31772013 is about 5636.6668342204. Note that the first 3 decimals coincide. The cubic root of 31772013 is about 316.7244401823.

Adding to 31772013 its reverse (31027713), we get a palindrome (62799726).

The spelling of 31772013 in words is "thirty-one million, seven hundred seventy-two thousand, thirteen".