22770521 has 4 divisors (see below), whose sum is σ = 23300112. Its totient is φ = 22240932.

The previous prime is 22770511. The next prime is 22770533. The reversal of 22770521 is 12507722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22770521 - 2¹⁰ = 22769497 is a prime.

It is a super-2 number, since 2×22770521² = 1036993253222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22770511) 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, 264731 + ... + 264816.

It is an arithmetic number, because the mean of its divisors is an integer number (5825028).

Almost surely, 2^22770521 is an apocalyptic number.

It is an amenable number.

22770521 is a deficient number, since it is larger than the sum of its proper divisors (529591).

22770521 is an equidigital number, since it uses as much as digits as its factorization.

22770521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529590.

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

The square root of 22770521 is about 4771.8467075127. The cubic root of 22770521 is about 283.4377265454.

The spelling of 22770521 in words is "twenty-two million, seven hundred seventy thousand, five hundred twenty-one".