51085192541 has 4 divisors (see below), whose sum is σ = 51086053500. Its totient is φ = 51084331584.

The previous prime is 51085192537. The next prime is 51085192583. The reversal of 51085192541 is 14529158015.

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 36006580516 + 15078612025 = 189754^2 + 122795^2 .

It is a cyclic number.

It is not a de Polignac number, because 51085192541 - 2² = 51085192537 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 (51085192511) 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, 334316 + ... + 462533.

It is an arithmetic number, because the mean of its divisors is an integer number (12771513375).

Almost surely, 2^51085192541 is an apocalyptic number.

It is an amenable number.

51085192541 is a deficient number, since it is larger than the sum of its proper divisors (860959).

51085192541 is an equidigital number, since it uses as much as digits as its factorization.

51085192541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860958.

The product of its (nonzero) digits is 72000, while the sum is 41.

The spelling of 51085192541 in words is "fifty-one billion, eighty-five million, one hundred ninety-two thousand, five hundred forty-one".