51105500053 has 2 divisors, whose sum is σ = 51105500054. Its totient is φ = 51105500052.

The previous prime is 51105500029. The next prime is 51105500057. The reversal of 51105500053 is 35000550115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39007040004 + 12098460049 = 197502^2 + 109993^2 .

It is a cyclic number.

It is not a de Polignac number, because 51105500053 - 2⁹ = 51105499541 is a prime.

It is a super-2 number, since 2×51105500053² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51105500057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552750026 + 25552750027.

It is an arithmetic number, because the mean of its divisors is an integer number (25552750027).

Almost surely, 2^51105500053 is an apocalyptic number.

It is an amenable number.

51105500053 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105500053 is an equidigital number, since it uses as much as digits as its factorization.

51105500053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1875, while the sum is 25.

The spelling of 51105500053 in words is "fifty-one billion, one hundred five million, five hundred thousand, fifty-three".