51085300901 has 4 divisors (see below), whose sum is σ = 51423614304. Its totient is φ = 50746987500.

The previous prime is 51085300873. The next prime is 51085300907. The reversal of 51085300901 is 10900358015.

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 an emirpimes, since its reverse is a distinct semiprime: 10900358015 = 5 ⋅2180071603.

It is a cyclic number.

It is not a de Polignac number, because 51085300901 - 2⁶ = 51085300837 is a prime.

It is a super-2 number, since 2×51085300901² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51085300907) 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, 169156475 + ... + 169156776.

It is an arithmetic number, because the mean of its divisors is an integer number (12855903576).

Almost surely, 2^51085300901 is an apocalyptic number.

It is an amenable number.

51085300901 is a deficient number, since it is larger than the sum of its proper divisors (338313403).

51085300901 is a wasteful number, since it uses less digits than its factorization.

51085300901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338313402.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 51085300901 its reverse (10900358015), we get a palindrome (61985658916).

The spelling of 51085300901 in words is "fifty-one billion, eighty-five million, three hundred thousand, nine hundred one".