10315391 has 2 divisors, whose sum is σ = 10315392. Its totient is φ = 10315390.

The previous prime is 10315381. The next prime is 10315397. The reversal of 10315391 is 19351301.

It is a strong prime.

It is an emirp because it is prime and its reverse (19351301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10315391 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10315397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5157695 + 5157696.

It is an arithmetic number, because the mean of its divisors is an integer number (5157696).

Almost surely, 2^10315391 is an apocalyptic number.

10315391 is a deficient number, since it is larger than the sum of its proper divisors (1).

10315391 is an equidigital number, since it uses as much as digits as its factorization.

10315391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 10315391 is about 3211.7582412131. The cubic root of 10315391 is about 217.6850303749.

Adding to 10315391 its reverse (19351301), we get a palindrome (29666692).

The spelling of 10315391 in words is "ten million, three hundred fifteen thousand, three hundred ninety-one".