51555223455 has 16 divisors (see below), whose sum is σ = 84406692480. Its totient is φ = 26856674208.

The previous prime is 51555223441. The next prime is 51555223469. The reversal of 51555223455 is 55432255515.

51555223455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51555223441) and next prime (51555223469).

It is not a de Polignac number, because 51555223455 - 2⁸ = 51555223199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39964645 + ... + 39965934.

It is an arithmetic number, because the mean of its divisors is an integer number (5275418280).

Almost surely, 2^51555223455 is an apocalyptic number.

51555223455 is a deficient number, since it is larger than the sum of its proper divisors (32851469025).

51555223455 is a wasteful number, since it uses less digits than its factorization.

51555223455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79930630.

The product of its digits is 750000, while the sum is 42.

The spelling of 51555223455 in words is "fifty-one billion, five hundred fifty-five million, two hundred twenty-three thousand, four hundred fifty-five".