51023143511 has 8 divisors (see below), whose sum is σ = 54027641520. Its totient is φ = 48018994048.

The previous prime is 51023143481. The next prime is 51023143517. The reversal of 51023143511 is 11534132015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51023143511 is a prime.

It is a super-2 number, since 2×51023143511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023143517) 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, 252005 + ... + 406881.

It is an arithmetic number, because the mean of its divisors is an integer number (6753455190).

Almost surely, 2^51023143511 is an apocalyptic number.

51023143511 is a deficient number, since it is larger than the sum of its proper divisors (3004498009).

51023143511 is a wasteful number, since it uses less digits than its factorization.

51023143511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174273.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 51023143511 its reverse (11534132015), we get a palindrome (62557275526).

The spelling of 51023143511 in words is "fifty-one billion, twenty-three million, one hundred forty-three thousand, five hundred eleven".