1006533431551 has 4 divisors (see below), whose sum is σ = 1013774679400. Its totient is φ = 999292183704.

The previous prime is 1006533431549. The next prime is 1006533431593. The reversal of 1006533431551 is 1551343356001.

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

It is a cyclic number.

It is not a de Polignac number, because 1006533431551 - 2¹ = 1006533431549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1006533431551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006533431251) 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, 3620623716 + ... + 3620623993.

It is an arithmetic number, because the mean of its divisors is an integer number (253443669850).

Almost surely, 2^{1006533431551} is an apocalyptic number.

1006533431551 is a deficient number, since it is larger than the sum of its proper divisors (7241247849).

1006533431551 is an equidigital number, since it uses as much as digits as its factorization.

1006533431551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7241247848.

The product of its (nonzero) digits is 81000, while the sum is 37.

Adding to 1006533431551 its reverse (1551343356001), we get a palindrome (2557876787552).

The spelling of 1006533431551 in words is "one trillion, six billion, five hundred thirty-three million, four hundred thirty-one thousand, five hundred fifty-one".