51515001097 has 24 divisors (see below), whose sum is σ = 60167923200. Its totient is φ = 43977497760.

The previous prime is 51515001089. The next prime is 51515001103. The reversal of 51515001097 is 79010051515.

It is a happy number.

It is not a de Polignac number, because 51515001097 - 2³ = 51515001089 is a prime.

It is a super-2 number, since 2×51515001097² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51515001007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24402072 + ... + 24404182.

It is an arithmetic number, because the mean of its divisors is an integer number (2506996800).

Almost surely, 2^51515001097 is an apocalyptic number.

It is an amenable number.

51515001097 is a deficient number, since it is larger than the sum of its proper divisors (8652922103).

51515001097 is a wasteful number, since it uses less digits than its factorization.

51515001097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901 (or 3894 counting only the distinct ones).

The product of its (nonzero) digits is 7875, while the sum is 34.

The spelling of 51515001097 in words is "fifty-one billion, five hundred fifteen million, one thousand, ninety-seven".