1133552021 has 4 divisors (see below), whose sum is σ = 1295488032. Its totient is φ = 971616012.

The previous prime is 1133552011. The next prime is 1133552023. The reversal of 1133552021 is 1202553311.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-1133552021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133552023) 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, 80967995 + ... + 80968008.

It is an arithmetic number, because the mean of its divisors is an integer number (323872008).

Almost surely, 2^1133552021 is an apocalyptic number.

It is an amenable number.

1133552021 is a deficient number, since it is larger than the sum of its proper divisors (161936011).

1133552021 is an equidigital number, since it uses as much as digits as its factorization.

1133552021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161936010.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1133552021 is about 33668.2643003764. The cubic root of 1133552021 is about 1042.6706573074.

The spelling of 1133552021 in words is "one billion, one hundred thirty-three million, five hundred fifty-two thousand, twenty-one".