51101111061 has 64 divisors (see below), whose sum is σ = 101646397440. Its totient is φ = 24504016320.

The previous prime is 51101111041. The next prime is 51101111069. The reversal of 51101111061 is 16011110115.

It is a happy number.

It is not a de Polignac number, because 51101111061 - 2⁷ = 51101110933 is a prime.

It is a super-2 number, since 2×51101111061² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101111069) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 918345 + ... + 972398.

It is an arithmetic number, because the mean of its divisors is an integer number (1588224960).

Almost surely, 2^51101111061 is an apocalyptic number.

It is an amenable number.

51101111061 is a deficient number, since it is larger than the sum of its proper divisors (50545286379).

51101111061 is a wasteful number, since it uses less digits than its factorization.

51101111061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890783 (or 1890777 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

Adding to 51101111061 its reverse (16011110115), we get a palindrome (67112221176).

The spelling of 51101111061 in words is "fifty-one billion, one hundred one million, one hundred eleven thousand, sixty-one".