31241302013 has 4 divisors (see below), whose sum is σ = 31241838108. Its totient is φ = 31240765920.

The previous prime is 31241302009. The next prime is 31241302039. The reversal of 31241302013 is 31020314213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21584898724 + 9656403289 = 146918^2 + 98267^2 .

It is a cyclic number.

It is not a de Polignac number, because 31241302013 - 2² = 31241302009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241304013) 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, 168248 + ... + 301313.

It is an arithmetic number, because the mean of its divisors is an integer number (7810459527).

Almost surely, 2^31241302013 is an apocalyptic number.

It is an amenable number.

31241302013 is a deficient number, since it is larger than the sum of its proper divisors (536095).

31241302013 is an equidigital number, since it uses as much as digits as its factorization.

31241302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536094.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31241302013 its reverse (31020314213), we get a palindrome (62261616226).

The spelling of 31241302013 in words is "thirty-one billion, two hundred forty-one million, three hundred two thousand, thirteen".