1051355321 has 4 divisors (see below), whose sum is σ = 1051428132. Its totient is φ = 1051282512.

The previous prime is 1051355287. The next prime is 1051355353. The reversal of 1051355321 is 1235531501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 69222400 + 982132921 = 8320^2 + 31339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051355321 - 2⁶ = 1051355257 is a prime.

It is a super-2 number, since 2×1051355321² = 2210696021990026082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051355381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6626 + ... + 46331.

It is an arithmetic number, because the mean of its divisors is an integer number (262857033).

Almost surely, 2^1051355321 is an apocalyptic number.

It is an amenable number.

1051355321 is a deficient number, since it is larger than the sum of its proper divisors (72811).

1051355321 is an equidigital number, since it uses as much as digits as its factorization.

1051355321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72810.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1051355321 is about 32424.6098048997. The cubic root of 1051355321 is about 1016.8334841319.

Adding to 1051355321 its reverse (1235531501), we get a palindrome (2286886822).

The spelling of 1051355321 in words is "one billion, fifty-one million, three hundred fifty-five thousand, three hundred twenty-one".