21283701 has 16 divisors (see below), whose sum is σ = 29534208. Its totient is φ = 13618800.

The previous prime is 21283699. The next prime is 21283721. The reversal of 21283701 is 10738212.

It is not a de Polignac number, because 21283701 - 2¹ = 21283699 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21283721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11310 + ... + 13056.

It is an arithmetic number, because the mean of its divisors is an integer number (1845888).

Almost surely, 2^21283701 is an apocalyptic number.

It is an amenable number.

21283701 is a deficient number, since it is larger than the sum of its proper divisors (8250507).

21283701 is a wasteful number, since it uses less digits than its factorization.

21283701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 21283701 is about 4613.4261671777. The cubic root of 21283701 is about 277.1292606152.

The spelling of 21283701 in words is "twenty-one million, two hundred eighty-three thousand, seven hundred one".