551251020539 has 4 divisors (see below), whose sum is σ = 558802404456. Its totient is φ = 543699636624.

The previous prime is 551251020493. The next prime is 551251020581. The reversal of 551251020539 is 935020152155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551251020539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551251020139) 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, 3775691849 + ... + 3775691994.

It is an arithmetic number, because the mean of its divisors is an integer number (139700601114).

Almost surely, 2^551251020539 is an apocalyptic number.

551251020539 is a deficient number, since it is larger than the sum of its proper divisors (7551383917).

551251020539 is an equidigital number, since it uses as much as digits as its factorization.

551251020539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551383916.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 551251020539 in words is "five hundred fifty-one billion, two hundred fifty-one million, twenty thousand, five hundred thirty-nine".