51001100501 has 4 divisors (see below), whose sum is σ = 54924262092. Its totient is φ = 47077938912.

The previous prime is 51001100483. The next prime is 51001100509. The reversal of 51001100501 is 10500110015.

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 5806592401 + 45194508100 = 76201^2 + 212590^2 .

It is a cyclic number.

It is not a de Polignac number, because 51001100501 - 2¹⁰ = 51001099477 is a prime.

It is a super-2 number, since 2×51001100501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001100509) 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, 1961580776 + ... + 1961580801.

It is an arithmetic number, because the mean of its divisors is an integer number (13731065523).

Almost surely, 2^51001100501 is an apocalyptic number.

It is an amenable number.

51001100501 is a deficient number, since it is larger than the sum of its proper divisors (3923161591).

51001100501 is a wasteful number, since it uses less digits than its factorization.

51001100501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923161590.

The product of its (nonzero) digits is 25, while the sum is 14.

Adding to 51001100501 its reverse (10500110015), we get a palindrome (61501210516).

The spelling of 51001100501 in words is "fifty-one billion, one million, one hundred thousand, five hundred one".