51103201523 has 4 divisors (see below), whose sum is σ = 55748947128. Its totient is φ = 46457455920.

The previous prime is 51103201507. The next prime is 51103201529. The reversal of 51103201523 is 32510230115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51103201523 - 2⁴ = 51103201507 is a prime.

It is a super-2 number, since 2×51103201523² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51103201529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322872786 + ... + 2322872807.

It is an arithmetic number, because the mean of its divisors is an integer number (13937236782).

Almost surely, 2^51103201523 is an apocalyptic number.

51103201523 is a deficient number, since it is larger than the sum of its proper divisors (4645745605).

51103201523 is a wasteful number, since it uses less digits than its factorization.

51103201523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645745604.

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

Adding to 51103201523 its reverse (32510230115), we get a palindrome (83613431638).

The spelling of 51103201523 in words is "fifty-one billion, one hundred three million, two hundred one thousand, five hundred twenty-three".