20152315 has 4 divisors (see below), whose sum is σ = 24182784. Its totient is φ = 16121848.

The previous prime is 20152313. The next prime is 20152333. The reversal of 20152315 is 51325102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51325102 = 2 ⋅25662551.

It is a cyclic number.

It is not a de Polignac number, because 20152315 - 2¹ = 20152313 is a prime.

It is a super-2 number, since 2×20152315² = 812231599718450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20152292 and 20152301.

It is not an unprimeable number, because it can be changed into a prime (20152313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015227 + ... + 2015236.

It is an arithmetic number, because the mean of its divisors is an integer number (6045696).

Almost surely, 2^20152315 is an apocalyptic number.

20152315 is a deficient number, since it is larger than the sum of its proper divisors (4030469).

20152315 is an equidigital number, since it uses as much as digits as its factorization.

20152315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030468.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 20152315 is about 4489.1329897877. The cubic root of 20152315 is about 272.1290972747.

Adding to 20152315 its reverse (51325102), we get a palindrome (71477417).

The spelling of 20152315 in words is "twenty million, one hundred fifty-two thousand, three hundred fifteen".