1055331321 has 16 divisors (see below), whose sum is σ = 1625323968. Its totient is φ = 601971200.

The previous prime is 1055331311. The next prime is 1055331323. The reversal of 1055331321 is 1231335501.

It is a cyclic number.

It is not a de Polignac number, because 1055331321 - 2¹⁵ = 1055298553 is a prime.

It is a super-2 number, since 2×1055331321² = 2227448394167210082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1055331291 and 1055331300.

It is not an unprimeable number, because it can be changed into a prime (1055331323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940020 + ... + 941141.

It is an arithmetic number, because the mean of its divisors is an integer number (101582748).

Almost surely, 2^1055331321 is an apocalyptic number.

1055331321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1055331321 is a deficient number, since it is larger than the sum of its proper divisors (569992647).

1055331321 is a wasteful number, since it uses less digits than its factorization.

1055331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881192.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1055331321 is about 32485.8634024094. The cubic root of 1055331321 is about 1018.1136869442.

Adding to 1055331321 its reverse (1231335501), we get a palindrome (2286666822).

The spelling of 1055331321 in words is "one billion, fifty-five million, three hundred thirty-one thousand, three hundred twenty-one".