51111442030 has 128 divisors (see below), whose sum is σ = 107480494080. Its totient is φ = 17314429440.

The previous prime is 51111441991. The next prime is 51111442033. The reversal of 51111442030 is 3024411115.

It is a super-2 number, since 2×51111442030² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 51111441992 and 51111442010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111442033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27229452 + ... + 27231328.

It is an arithmetic number, because the mean of its divisors is an integer number (839691360).

Almost surely, 2^51111442030 is an apocalyptic number.

51111442030 is an abundant number, since it is smaller than the sum of its proper divisors (56369052050).

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

51111442030 is a wasteful number, since it uses less digits than its factorization.

51111442030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 51111442030 its reverse (3024411115), we get a palindrome (54135853145).

The spelling of 51111442030 in words is "fifty-one billion, one hundred eleven million, four hundred forty-two thousand, thirty".