51111514541 has 8 divisors (see below), whose sum is σ = 51979151544. Its totient is φ = 50244837120.

The previous prime is 51111514513. The next prime is 51111514567. The reversal of 51111514541 is 14541511115.

It can be written as a sum of positive squares in 4 ways, for example, as 13306545316 + 37804969225 = 115354^2 + 194435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51111514541 - 2⁶ = 51111514477 is a prime.

It is a super-2 number, since 2×51111514541² (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 (51111514141) 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 7 ways as a sum of consecutive naturals, for example, 132056 + ... + 345921.

It is an arithmetic number, because the mean of its divisors is an integer number (6497393943).

Almost surely, 2^51111514541 is an apocalyptic number.

It is an amenable number.

51111514541 is a deficient number, since it is larger than the sum of its proper divisors (867637003).

51111514541 is a wasteful number, since it uses less digits than its factorization.

51111514541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479791.

The product of its digits is 2000, while the sum is 29.

The spelling of 51111514541 in words is "fifty-one billion, one hundred eleven million, five hundred fourteen thousand, five hundred forty-one".