21770522 has 8 divisors (see below), whose sum is σ = 32676672. Its totient is φ = 10878300.

The previous prime is 21770521. The next prime is 21770531. The reversal of 21770522 is 22507712.

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

It is a junction number, because it is equal to n+sod(n) for n = 21770491 and 21770500.

It is not an unprimeable number, because it can be changed into a prime (21770521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447 + ... + 7037.

It is an arithmetic number, because the mean of its divisors is an integer number (4084584).

Almost surely, 2^21770522 is an apocalyptic number.

21770522 is a deficient number, since it is larger than the sum of its proper divisors (10906150).

21770522 is a wasteful number, since it uses less digits than its factorization.

21770522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 21770522 is about 4665.8891971413. The cubic root of 21770522 is about 279.2262737896.

The spelling of 21770522 in words is "twenty-one million, seven hundred seventy thousand, five hundred twenty-two".