51555223554 has 8 divisors (see below), whose sum is σ = 103110447120. Its totient is φ = 17185074516.

The previous prime is 51555223529. The next prime is 51555223579. The reversal of 51555223554 is 45532255515.

It is an interprime number because it is at equal distance from previous prime (51555223529) and next prime (51555223579).

It is a sphenic number, since it is the product of 3 distinct primes.

51555223554 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4296268624 + ... + 4296268635.

It is an arithmetic number, because the mean of its divisors is an integer number (12888805890).

Almost surely, 2^51555223554 is an apocalyptic number.

51555223554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51555223554 is a wasteful number, since it uses less digits than its factorization.

51555223554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592537264.

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

The spelling of 51555223554 in words is "fifty-one billion, five hundred fifty-five million, two hundred twenty-three thousand, five hundred fifty-four".