51111051013 has 8 divisors (see below), whose sum is σ = 55759151520. Its totient is φ = 46463224080.

The previous prime is 51111051001. The next prime is 51111051031. The reversal of 51111051013 is 31015011115.

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 51111051013 - 2⁵ = 51111050981 is a prime.

It is a super-2 number, since 2×51111051013² (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 (51111051613) 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, 654606 + ... + 728512.

It is an arithmetic number, because the mean of its divisors is an integer number (6969893940).

Almost surely, 2^51111051013 is an apocalyptic number.

It is an amenable number.

51111051013 is a deficient number, since it is larger than the sum of its proper divisors (4648100507).

51111051013 is a wasteful number, since it uses less digits than its factorization.

51111051013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136787.

The product of its (nonzero) digits is 75, while the sum is 19.

Adding to 51111051013 its reverse (31015011115), we get a palindrome (82126062128).

The spelling of 51111051013 in words is "fifty-one billion, one hundred eleven million, fifty-one thousand, thirteen".