21496315 has 16 divisors (see below), whose sum is σ = 27544320. Its totient is φ = 16057440.

The previous prime is 21496309. The next prime is 21496327. The reversal of 21496315 is 51369412.

It is not a de Polignac number, because 21496315 - 2⁷ = 21496187 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5152 + ... + 8338.

It is an arithmetic number, because the mean of its divisors is an integer number (1721520).

Almost surely, 2^21496315 is an apocalyptic number.

21496315 is a deficient number, since it is larger than the sum of its proper divisors (6048005).

21496315 is a wasteful number, since it uses less digits than its factorization.

21496315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282.

The product of its digits is 6480, while the sum is 31.

The square root of 21496315 is about 4636.4118669506. The cubic root of 21496315 is about 278.0490010755.

It can be divided in two parts, 2149 and 6315, that added together give a square (8464 = 92²).

The spelling of 21496315 in words is "twenty-one million, four hundred ninety-six thousand, three hundred fifteen".