51023011523 has 8 divisors (see below), whose sum is σ = 58935671280. Its totient is φ = 43656052480.

The previous prime is 51023011463. The next prime is 51023011537. The reversal of 51023011523 is 32511032015.

It is a happy number.

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 51023011523 - 2³² = 46728044227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51023013523) 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, 136424978 + ... + 136425351.

It is an arithmetic number, because the mean of its divisors is an integer number (7366958910).

Almost surely, 2^51023011523 is an apocalyptic number.

51023011523 is a deficient number, since it is larger than the sum of its proper divisors (7912659757).

51023011523 is a wasteful number, since it uses less digits than its factorization.

51023011523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272850357.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 51023011523 its reverse (32511032015), we get a palindrome (83534043538).

The spelling of 51023011523 in words is "fifty-one billion, twenty-three million, eleven thousand, five hundred twenty-three".