102551125517 has 4 divisors (see below), whose sum is σ = 105322777596. Its totient is φ = 99779473440.

The previous prime is 102551125421. The next prime is 102551125519. The reversal of 102551125517 is 715521155201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81182825476 + 21368300041 = 284926^2 + 146179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102551125517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102551125519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385825984 + ... + 1385826057.

It is an arithmetic number, because the mean of its divisors is an integer number (26330694399).

Almost surely, 2^102551125517 is an apocalyptic number.

It is an amenable number.

102551125517 is a deficient number, since it is larger than the sum of its proper divisors (2771652079).

102551125517 is an equidigital number, since it uses as much as digits as its factorization.

102551125517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771652078.

The product of its (nonzero) digits is 17500, while the sum is 35.

The spelling of 102551125517 in words is "one hundred two billion, five hundred fifty-one million, one hundred twenty-five thousand, five hundred seventeen".