31024013 has 2 divisors, whose sum is σ = 31024014. Its totient is φ = 31024012.

The previous prime is 31024009. The next prime is 31024043. The reversal of 31024013 is 31042013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30713764 + 310249 = 5542^2 + 557^2 .

It is an emirp because it is prime and its reverse (31042013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31024013 - 2² = 31024009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31024043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15512006 + 15512007.

It is an arithmetic number, because the mean of its divisors is an integer number (15512007).

Almost surely, 2^31024013 is an apocalyptic number.

It is an amenable number.

31024013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31024013 is an equidigital number, since it uses as much as digits as its factorization.

31024013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31024013 is about 5569.9203764506. The cubic root of 31024013 is about 314.2191561043.

Adding to 31024013 its reverse (31042013), we get a palindrome (62066026).

The spelling of 31024013 in words is "thirty-one million, twenty-four thousand, thirteen".