21772701 has 12 divisors (see below), whose sum is σ = 31505760. Its totient is φ = 14489160.

The previous prime is 21772691. The next prime is 21772741. The reversal of 21772701 is 10727712.

It is not a de Polignac number, because 21772701 - 2¹¹ = 21770653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21772741) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4096 + ... + 7766.

It is an arithmetic number, because the mean of its divisors is an integer number (2625480).

Almost surely, 2^21772701 is an apocalyptic number.

It is an amenable number.

21772701 is a deficient number, since it is larger than the sum of its proper divisors (9733059).

21772701 is a wasteful number, since it uses less digits than its factorization.

21772701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336 (or 4333 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 21772701 is about 4666.1226944863. The cubic root of 21772701 is about 279.2355893486.

The spelling of 21772701 in words is "twenty-one million, seven hundred seventy-two thousand, seven hundred one".