51515055551001 has 16 divisors (see below), whose sum is σ = 83116728284544. Its totient is φ = 27705576094464.

The previous prime is 51515055550927. The next prime is 51515055551101. The reversal of 51515055551001 is 10015555051515.

It is not a de Polignac number, because 51515055551001 - 2¹⁵ = 51515055518233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51515055551101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72149937390 + ... + 72149938103.

It is an arithmetic number, because the mean of its divisors is an integer number (5194795517784).

Almost surely, 2^{51515055551001} is an apocalyptic number.

51515055551001 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51515055551001 is a deficient number, since it is larger than the sum of its proper divisors (31601672733543).

51515055551001 is a wasteful number, since it uses less digits than its factorization.

51515055551001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144299875520.

The product of its (nonzero) digits is 78125, while the sum is 39.

The spelling of 51515055551001 in words is "fifty-one trillion, five hundred fifteen billion, fifty-five million, five hundred fifty-one thousand, one".