1001442533561 has 4 divisors (see below), whose sum is σ = 1001824620324. Its totient is φ = 1001060446800.

The previous prime is 1001442533551. The next prime is 1001442533563. The reversal of 1001442533561 is 1653352441001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 950927274025 + 50515259536 = 975155^2 + 224756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001442533561 is a prime.

It is a super-2 number, since 2×1001442533561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001442533563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191039450 + ... + 191044691.

It is an arithmetic number, because the mean of its divisors is an integer number (250456155081).

Almost surely, 2^{1001442533561} is an apocalyptic number.

It is an amenable number.

1001442533561 is a deficient number, since it is larger than the sum of its proper divisors (382086763).

1001442533561 is an equidigital number, since it uses as much as digits as its factorization.

1001442533561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382086762.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 1001442533561 its reverse (1653352441001), we get a palindrome (2654794974562).

The spelling of 1001442533561 in words is "one trillion, one billion, four hundred forty-two million, five hundred thirty-three thousand, five hundred sixty-one".