19315 has 4 divisors (see below), whose sum is σ = 23184. Its totient is φ = 15448.

The previous prime is 19309. The next prime is 19319. The reversal of 19315 is 51391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51391 = 17 ⋅3023.

It is a cyclic number.

It is not a de Polignac number, because 19315 - 2⁹ = 18803 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 19292 and 19301.

It is not an unprimeable number, because it can be changed into a prime (19319) 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, 1927 + ... + 1936.

It is an arithmetic number, because the mean of its divisors is an integer number (5796).

2¹⁹³¹⁵ is an apocalyptic number.

19315 is a deficient number, since it is larger than the sum of its proper divisors (3869).

19315 is an equidigital number, since it uses as much as digits as its factorization.

19315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868.

The product of its digits is 135, while the sum is 19.

The square root of 19315 is about 138.9784155903. The cubic root of 19315 is about 26.8306732786.

It can be divided in two parts, 1931 and 5, that added together give a square (1936 = 44²).

The spelling of 19315 in words is "nineteen thousand, three hundred fifteen".