1055221533 has 16 divisors (see below), whose sum is σ = 1563799360. Its totient is φ = 703252368.

The previous prime is 1055221523. The next prime is 1055221543. The reversal of 1055221533 is 3351225501.

It is a happy number.

1055221533 is a `hidden beast` number, since 105 + 5 + 2 + 21 + 533 = 666.

It is an interprime number because it is at equal distance from previous prime (1055221523) and next prime (1055221543).

It is a de Polignac number, because none of the positive numbers 2^k-1055221533 is a prime.

It is a super-2 number, since 2×1055221533² = 2226984967413740178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1055221497 and 1055221506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055221523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137391 + ... + 144867.

It is an arithmetic number, because the mean of its divisors is an integer number (97737460).

Almost surely, 2^1055221533 is an apocalyptic number.

It is an amenable number.

1055221533 is a deficient number, since it is larger than the sum of its proper divisors (508577827).

1055221533 is an equidigital number, since it uses as much as digits as its factorization.

1055221533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12713 (or 12707 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1055221533 is about 32484.1735772976. The cubic root of 1055221533 is about 1018.0783803255.

The spelling of 1055221533 in words is "one billion, fifty-five million, two hundred twenty-one thousand, five hundred thirty-three".