21713301 has 12 divisors (see below), whose sum is σ = 33208812. Its totient is φ = 13623936.

The previous prime is 21713297. The next prime is 21713359. The reversal of 21713301 is 10331712.

It can be written as a sum of positive squares in 2 ways, for example, as 13727025 + 7986276 = 3705^2 + 2826^2 .

It is not a de Polignac number, because 21713301 - 2² = 21713297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21713501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70806 + ... + 71111.

It is an arithmetic number, because the mean of its divisors is an integer number (2767401).

Almost surely, 2^21713301 is an apocalyptic number.

It is an amenable number.

21713301 is a deficient number, since it is larger than the sum of its proper divisors (11495511).

21713301 is a wasteful number, since it uses less digits than its factorization.

21713301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141940 (or 141937 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 21713301 is about 4659.7533196512. The cubic root of 21713301 is about 278.9814224343.

The spelling of 21713301 in words is "twenty-one million, seven hundred thirteen thousand, three hundred one".