51001120170 has 384 divisors, whose sum is σ = 178950739968. Its totient is φ = 9732441600.

The previous prime is 51001120169. The next prime is 51001120171. The reversal of 51001120170 is 7102110015.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51001120169) and next prime (51001120171).

It is a super-2 number, since 2×51001120170² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51001120171) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 19007649 + ... + 19010331.

It is an arithmetic number, because the mean of its divisors is an integer number (466017552).

Almost surely, 2^51001120170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51001120170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89475369984).

51001120170 is an abundant number, since it is smaller than the sum of its proper divisors (127949619798).

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

51001120170 is a wasteful number, since it uses less digits than its factorization.

51001120170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938 (or 2935 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

Adding to 51001120170 its reverse (7102110015), we get a palindrome (58103230185).

It can be divided in two parts, 51001 and 120170, that added together give a palindrome (171171).

The spelling of 51001120170 in words is "fifty-one billion, one million, one hundred twenty thousand, one hundred seventy".