42115313 has 2 divisors, whose sum is σ = 42115314. Its totient is φ = 42115312.

The previous prime is 42115303. The next prime is 42115331. The reversal of 42115313 is 31351124.

Together with next prime (42115331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35724529 + 6390784 = 5977^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 42115313 - 2¹⁴ = 42098929 is a prime.

It is not a weakly prime, because it can be changed into another prime (42115303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21057656 + 21057657.

It is an arithmetic number, because the mean of its divisors is an integer number (21057657).

Almost surely, 2^42115313 is an apocalyptic number.

It is an amenable number.

42115313 is a deficient number, since it is larger than the sum of its proper divisors (1).

42115313 is an equidigital number, since it uses as much as digits as its factorization.

42115313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 42115313 is about 6489.6311913698. The cubic root of 42115313 is about 347.9204936834.

Adding to 42115313 its reverse (31351124), we get a palindrome (73466437).

The spelling of 42115313 in words is "forty-two million, one hundred fifteen thousand, three hundred thirteen".