21141315 has 48 divisors (see below), whose sum is σ = 40098240. Its totient is φ = 10241280.

The previous prime is 21141299. The next prime is 21141317. The reversal of 21141315 is 51314112.

It is not a de Polignac number, because 21141315 - 2⁴ = 21141299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21141317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41281 + ... + 41789.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^21141315 is an apocalyptic number.

21141315 is a deficient number, since it is larger than the sum of its proper divisors (18956925).

21141315 is a wasteful number, since it uses less digits than its factorization.

21141315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 601 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 21141315 is about 4597.9685731853. The cubic root of 21141315 is about 276.5098876266.

Adding to 21141315 its reverse (51314112), we get a palindrome (72455427).

The spelling of 21141315 in words is "twenty-one million, one hundred forty-one thousand, three hundred fifteen".