1053533021 has 4 divisors (see below), whose sum is σ = 1063379232. Its totient is φ = 1043686812.

The previous prime is 1053533017. The next prime is 1053533029. The reversal of 1053533021 is 1203353501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1053533021 - 2² = 1053533017 is a prime.

It is a super-2 number, since 2×1053533021² = 2219863652674772882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053533029) 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 3 ways as a sum of consecutive naturals, for example, 4922945 + ... + 4923158.

It is an arithmetic number, because the mean of its divisors is an integer number (265844808).

Almost surely, 2^1053533021 is an apocalyptic number.

It is an amenable number.

1053533021 is a deficient number, since it is larger than the sum of its proper divisors (9846211).

1053533021 is an equidigital number, since it uses as much as digits as its factorization.

1053533021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846210.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1053533021 is about 32458.1734082496. The cubic root of 1053533021 is about 1017.5350646236.

Adding to 1053533021 its reverse (1203353501), we get a palindrome (2256886522).

The spelling of 1053533021 in words is "one billion, fifty-three million, five hundred thirty-three thousand, twenty-one".