10221577 has 4 divisors (see below), whose sum is σ = 10258756. Its totient is φ = 10184400.

The previous prime is 10221571. The next prime is 10221619. The reversal of 10221577 is 77512201.

It is a happy number.

10221577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77512201 = 13 ⋅5962477.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 9418761 = 896^2 + 3069^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221577 - 2²³ = 1832969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221571) 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, 18174 + ... + 18727.

It is an arithmetic number, because the mean of its divisors is an integer number (2564689).

Almost surely, 2^10221577 is an apocalyptic number.

It is an amenable number.

10221577 is a deficient number, since it is larger than the sum of its proper divisors (37179).

10221577 is an equidigital number, since it uses as much as digits as its factorization.

10221577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37178.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 10221577 is about 3197.1201103493. The cubic root of 10221577 is about 217.0231027241.

Adding to 10221577 its reverse (77512201), we get a palindrome (87733778).

The spelling of 10221577 in words is "ten million, two hundred twenty-one thousand, five hundred seventy-seven".