51101335501 has 4 divisors (see below), whose sum is σ = 51675507900. Its totient is φ = 50527163104.

The previous prime is 51101335477. The next prime is 51101335543. The reversal of 51101335501 is 10553310115.

It is a happy number.

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 20450430025 + 30650905476 = 143005^2 + 175074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51101335501 is a prime.

It is a super-2 number, since 2×51101335501² (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 (51101333501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287086066 + ... + 287086243.

It is an arithmetic number, because the mean of its divisors is an integer number (12918876975).

Almost surely, 2^51101335501 is an apocalyptic number.

It is an amenable number.

51101335501 is a deficient number, since it is larger than the sum of its proper divisors (574172399).

51101335501 is an equidigital number, since it uses as much as digits as its factorization.

51101335501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574172398.

The product of its (nonzero) digits is 1125, while the sum is 25.

Adding to 51101335501 its reverse (10553310115), we get a palindrome (61654645616).

The spelling of 51101335501 in words is "fifty-one billion, one hundred one million, three hundred thirty-five thousand, five hundred one".