51100551061 has 6 divisors (see below), whose sum is σ = 59443498230. Its totient is φ = 43800472296.

The previous prime is 51100551059. The next prime is 51100551067. The reversal of 51100551061 is 16015500115.

It can be written as a sum of positive squares in only one way, i.e., 44149994161 + 6950556900 = 210119^2 + 83370^2 .

It is not a de Polignac number, because 51100551061 - 2¹ = 51100551059 is a prime.

It is a super-2 number, since 2×51100551061² (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 (51100551067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 521434146 + ... + 521434243.

It is an arithmetic number, because the mean of its divisors is an integer number (9907249705).

Almost surely, 2^51100551061 is an apocalyptic number.

It is an amenable number.

51100551061 is a deficient number, since it is larger than the sum of its proper divisors (8342947169).

51100551061 is a wasteful number, since it uses less digits than its factorization.

51100551061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042868403 (or 1042868396 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 51100551061 in words is "fifty-one billion, one hundred million, five hundred fifty-one thousand, sixty-one".