1051232321 has 4 divisors (see below), whose sum is σ = 1051349700. Its totient is φ = 1051114944.

The previous prime is 1051232257. The next prime is 1051232353. The reversal of 1051232321 is 1232321501.

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 820192321 + 231040000 = 28639^2 + 15200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051232321 - 2⁶ = 1051232257 is a prime.

It is a super-2 number, since 2×1051232321² = 2210178785430094082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1051232293 and 1051232302.

It is not an unprimeable number, because it can be changed into a prime (1057232321) 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, 44036 + ... + 63573.

It is an arithmetic number, because the mean of its divisors is an integer number (262837425).

Almost surely, 2^1051232321 is an apocalyptic number.

It is an amenable number.

1051232321 is a deficient number, since it is larger than the sum of its proper divisors (117379).

1051232321 is an equidigital number, since it uses as much as digits as its factorization.

1051232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117378.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1051232321 is about 32422.7130419402. The cubic root of 1051232321 is about 1016.7938288432.

Adding to 1051232321 its reverse (1232321501), we get a palindrome (2283553822).

The spelling of 1051232321 in words is "one billion, fifty-one million, two hundred thirty-two thousand, three hundred twenty-one".