51730172154 has 32 divisors (see below), whose sum is σ = 116575044480. Its totient is φ = 17000524800.

The previous prime is 51730172129. The next prime is 51730172159. The reversal of 51730172154 is 45127103715.

It is a super-2 number, since 2×51730172154² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51730172159) 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 15 ways as a sum of consecutive naturals, for example, 6742407 + ... + 6750074.

It is an arithmetic number, because the mean of its divisors is an integer number (3642970140).

Almost surely, 2^51730172154 is an apocalyptic number.

51730172154 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51730172154 is an abundant number, since it is smaller than the sum of its proper divisors (64844872326).

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

51730172154 is a wasteful number, since it uses less digits than its factorization.

51730172154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13492563 (or 13492557 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

Adding to 51730172154 its reverse (45127103715), we get a palindrome (96857275869).

The spelling of 51730172154 in words is "fifty-one billion, seven hundred thirty million, one hundred seventy-two thousand, one hundred fifty-four".