1223530001 has 4 divisors (see below), whose sum is σ = 1295502372. Its totient is φ = 1151557632.

The previous prime is 1223529973. The next prime is 1223530003. The reversal of 1223530001 is 1000353221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 433638976 + 789891025 = 20824^2 + 28105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223530001 - 2²⁶ = 1156421137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 71972353 = 1223530001 / (1 + 2 + 2 + 3 + 5 + 3 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223530003) 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, 35986160 + ... + 35986193.

It is an arithmetic number, because the mean of its divisors is an integer number (323875593).

Almost surely, 2^1223530001 is an apocalyptic number.

It is an amenable number.

1223530001 is a deficient number, since it is larger than the sum of its proper divisors (71972371).

1223530001 is an equidigital number, since it uses as much as digits as its factorization.

1223530001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71972370.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1223530001 is about 34978.9937105115. The cubic root of 1223530001 is about 1069.5593145520.

Adding to 1223530001 its reverse (1000353221), we get a palindrome (2223883222).

The spelling of 1223530001 in words is "one billion, two hundred twenty-three million, five hundred thirty thousand, one".