21495701 has 8 divisors (see below), whose sum is σ = 22817664. Its totient is φ = 20180160.

The previous prime is 21495673. The next prime is 21495703. The reversal of 21495701 is 10759412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21495701 - 2⁶ = 21495637 is a prime.

It is a super-2 number, since 2×21495701² = 924130322962802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21495703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6506 + ... + 9236.

It is an arithmetic number, because the mean of its divisors is an integer number (2852208).

Almost surely, 2^21495701 is an apocalyptic number.

It is an amenable number.

21495701 is a deficient number, since it is larger than the sum of its proper divisors (1321963).

21495701 is a wasteful number, since it uses less digits than its factorization.

21495701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 21495701 is about 4636.3456514803. The cubic root of 21495701 is about 278.0463537425.

The spelling of 21495701 in words is "twenty-one million, four hundred ninety-five thousand, seven hundred one".