4561125221 has 4 divisors (see below), whose sum is σ = 4590177132. Its totient is φ = 4532073312.

The previous prime is 4561125203. The next prime is 4561125227. The reversal of 4561125221 is 1225211654.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1225211654 = 2 ⋅612605827.

It can be written as a sum of positive squares in 2 ways, for example, as 1313265121 + 3247860100 = 36239^2 + 56990^2 .

It is a cyclic number.

It is not a de Polignac number, because 4561125221 - 2⁶ = 4561125157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4561125227) 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, 14525720 + ... + 14526033.

It is an arithmetic number, because the mean of its divisors is an integer number (1147544283).

Almost surely, 2^4561125221 is an apocalyptic number.

It is an amenable number.

4561125221 is a deficient number, since it is larger than the sum of its proper divisors (29051911).

4561125221 is a wasteful number, since it uses less digits than its factorization.

4561125221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29051910.

The product of its digits is 4800, while the sum is 29.

The square root of 4561125221 is about 67536.1030930864. The cubic root of 4561125221 is about 1658.4052547367.

Adding to 4561125221 its reverse (1225211654), we get a palindrome (5786336875).

The spelling of 4561125221 in words is "four billion, five hundred sixty-one million, one hundred twenty-five thousand, two hundred twenty-one".