1081331533 has 4 divisors (see below), whose sum is σ = 1081408608. Its totient is φ = 1081254460.

The previous prime is 1081331519. The next prime is 1081331543. The reversal of 1081331533 is 3351331801.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081331533 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 (1081331543) 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, 10873 + ... + 47758.

It is an arithmetic number, because the mean of its divisors is an integer number (270352152).

Almost surely, 2^1081331533 is an apocalyptic number.

It is an amenable number.

1081331533 is a deficient number, since it is larger than the sum of its proper divisors (77075).

1081331533 is an equidigital number, since it uses as much as digits as its factorization.

1081331533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77074.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1081331533 is about 32883.6058393845. The cubic root of 1081331533 is about 1026.4070410275.

The spelling of 1081331533 in words is "one billion, eighty-one million, three hundred thirty-one thousand, five hundred thirty-three".