51111455239 has 8 divisors (see below), whose sum is σ = 55046000240. Its totient is φ = 47177323776.

The previous prime is 51111455203. The next prime is 51111455261. The reversal of 51111455239 is 93255411115.

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 51111455239 - 2²¹ = 51109358087 is a prime.

It is a super-2 number, since 2×51111455239² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51111455198 and 51111455207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111455279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182647 + ... + 368215.

It is an arithmetic number, because the mean of its divisors is an integer number (6880750030).

Almost surely, 2^51111455239 is an apocalyptic number.

51111455239 is a deficient number, since it is larger than the sum of its proper divisors (3934545001).

51111455239 is a wasteful number, since it uses less digits than its factorization.

51111455239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206769.

The product of its digits is 27000, while the sum is 37.

The spelling of 51111455239 in words is "fifty-one billion, one hundred eleven million, four hundred fifty-five thousand, two hundred thirty-nine".