102161551 has 8 divisors (see below), whose sum is σ = 111095280. Its totient is φ = 93552768.

The previous prime is 102161539. The next prime is 102161557. The reversal of 102161551 is 155161201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102161551 - 2⁹ = 102161039 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 (102161557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80581 + ... + 81838.

It is an arithmetic number, because the mean of its divisors is an integer number (13886910).

Almost surely, 2^102161551 is an apocalyptic number.

102161551 is a deficient number, since it is larger than the sum of its proper divisors (8933729).

102161551 is a wasteful number, since it uses less digits than its factorization.

102161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162473.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 102161551 is about 10107.4997402919. The cubic root of 102161551 is about 467.4794157198.

The spelling of 102161551 in words is "one hundred two million, one hundred sixty-one thousand, five hundred fifty-one".