51031111145 has 16 divisors (see below), whose sum is σ = 73668973440. Its totient is φ = 33151037184.

The previous prime is 51031111111. The next prime is 51031111147. The reversal of 51031111145 is 54111113015.

It is a cyclic number.

It is not a de Polignac number, because 51031111145 - 2²² = 51026916841 is a prime.

It is a super-2 number, since 2×51031111145² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51031111145.

It is not an unprimeable number, because it can be changed into a prime (51031111147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38368592 + ... + 38369921.

It is an arithmetic number, because the mean of its divisors is an integer number (4604310840).

Almost surely, 2^51031111145 is an apocalyptic number.

It is an amenable number.

51031111145 is a deficient number, since it is larger than the sum of its proper divisors (22637862295).

51031111145 is a wasteful number, since it uses less digits than its factorization.

51031111145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76738544.

The product of its (nonzero) digits is 300, while the sum is 23.

The spelling of 51031111145 in words is "fifty-one billion, thirty-one million, one hundred eleven thousand, one hundred forty-five".