51103155563 has 2 divisors, whose sum is σ = 51103155564. Its totient is φ = 51103155562.

The previous prime is 51103155529. The next prime is 51103155577. The reversal of 51103155563 is 36555130115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51103155563 - 2¹⁴ = 51103139179 is a prime.

It is a super-2 number, since 2×51103155563² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51103155503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551577781 + 25551577782.

It is an arithmetic number, because the mean of its divisors is an integer number (25551577782).

Almost surely, 2^51103155563 is an apocalyptic number.

51103155563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51103155563 is an equidigital number, since it uses as much as digits as its factorization.

51103155563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33750, while the sum is 35.

Adding to 51103155563 its reverse (36555130115), we get a palindrome (87658285678).

The spelling of 51103155563 in words is "fifty-one billion, one hundred three million, one hundred fifty-five thousand, five hundred sixty-three".