51133111023 has 8 divisors (see below), whose sum is σ = 68192447536. Its totient is φ = 34081257600.

The previous prime is 51133111021. The next prime is 51133111027. The reversal of 51133111023 is 32011133115.

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

It is not a de Polignac number, because 51133111023 - 2¹ = 51133111021 is a prime.

It is a super-2 number, since 2×51133111023² (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 (51133111021) 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, 1854808 + ... + 1882173.

It is an arithmetic number, because the mean of its divisors is an integer number (8524055942).

Almost surely, 2^51133111023 is an apocalyptic number.

51133111023 is a deficient number, since it is larger than the sum of its proper divisors (17059336513).

51133111023 is a wasteful number, since it uses less digits than its factorization.

51133111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741545.

The product of its (nonzero) digits is 270, while the sum is 21.

Adding to 51133111023 its reverse (32011133115), we get a palindrome (83144244138).

The spelling of 51133111023 in words is "fifty-one billion, one hundred thirty-three million, one hundred eleven thousand, twenty-three".