51111162100 has 36 divisors (see below), whose sum is σ = 110977101004. Its totient is φ = 20432321280.

The previous prime is 51111162077. The next prime is 51111162101. The reversal of 51111162100 is 126111115.

It can be written as a sum of positive squares in 6 ways, for example, as 11655396 + 51099506704 = 3414^2 + 226052^2 .

It is a super-2 number, since 2×51111162100² (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 (51111162101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18352 + ... + 320248.

Almost surely, 2^51111162100 is an apocalyptic number.

51111162100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51111162100 is an abundant number, since it is smaller than the sum of its proper divisors (59865938904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111162100 is a wasteful number, since it uses less digits than its factorization.

51111162100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303604 (or 303597 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 51111162100 its reverse (126111115), we get a palindrome (51237273215).

The spelling of 51111162100 in words is "fifty-one billion, one hundred eleven million, one hundred sixty-two thousand, one hundred".