51155232224 has 24 divisors (see below), whose sum is σ = 100722472200. Its totient is φ = 25574921856.

The previous prime is 51155232223. The next prime is 51155232229. The reversal of 51155232224 is 42223255115.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155232221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244022 + ... + 402314.

It is an arithmetic number, because the mean of its divisors is an integer number (4196769675).

Almost surely, 2^51155232224 is an apocalyptic number.

It is an amenable number.

51155232224 is a deficient number, since it is larger than the sum of its proper divisors (49567239976).

51155232224 is a wasteful number, since it uses less digits than its factorization.

51155232224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168402 (or 168394 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

Adding to 51155232224 its reverse (42223255115), we get a palindrome (93378487339).

The spelling of 51155232224 in words is "fifty-one billion, one hundred fifty-five million, two hundred thirty-two thousand, two hundred twenty-four".