51005105501 has 8 divisors (see below), whose sum is σ = 58317624960. Its totient is φ = 43699105008.

The previous prime is 51005105461. The next prime is 51005105507. The reversal of 51005105501 is 10550150015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51005105501 - 2²² = 51000911197 is a prime.

It is a super-2 number, since 2×51005105501² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005105507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1612961 + ... + 1644278.

It is an arithmetic number, because the mean of its divisors is an integer number (7289703120).

Almost surely, 2^51005105501 is an apocalyptic number.

It is an amenable number.

51005105501 is a deficient number, since it is larger than the sum of its proper divisors (7312519459).

51005105501 is a wasteful number, since it uses less digits than its factorization.

51005105501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259483.

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 51005105501 its reverse (10550150015), we get a palindrome (61555255516).

The spelling of 51005105501 in words is "fifty-one billion, five million, one hundred five thousand, five hundred one".