21152495 has 16 divisors (see below), whose sum is σ = 31241280. Its totient is φ = 13388544.

The previous prime is 21152477. The next prime is 21152507. The reversal of 21152495 is 59425112.

It is not a de Polignac number, because 21152495 - 2⁸ = 21152239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22790 + ... + 23699.

It is an arithmetic number, because the mean of its divisors is an integer number (1952580).

Almost surely, 2^21152495 is an apocalyptic number.

21152495 is a deficient number, since it is larger than the sum of its proper divisors (10088785).

21152495 is a wasteful number, since it uses less digits than its factorization.

21152495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46514.

The product of its digits is 3600, while the sum is 29.

The square root of 21152495 is about 4599.1841667844. The cubic root of 21152495 is about 276.5586205740.

The spelling of 21152495 in words is "twenty-one million, one hundred fifty-two thousand, four hundred ninety-five".