102157173 has 16 divisors (see below), whose sum is σ = 151642560. Its totient is φ = 67970448.

The previous prime is 102157171. The next prime is 102157177. The reversal of 102157173 is 371751201.

It is a happy number.

102157173 is a `hidden beast` number, since 1 + 0 + 21 + 571 + 73 = 666.

It is not a de Polignac number, because 102157173 - 2¹ = 102157171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102157171) 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, 11311 + ... + 18227.

It is an arithmetic number, because the mean of its divisors is an integer number (9477660).

Almost surely, 2^102157173 is an apocalyptic number.

It is an amenable number.

102157173 is a deficient number, since it is larger than the sum of its proper divisors (49485387).

102157173 is an equidigital number, since it uses as much as digits as its factorization.

102157173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7473 (or 7467 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 102157173 is about 10107.2831661134. The cubic root of 102157173 is about 467.4727378843.

The spelling of 102157173 in words is "one hundred two million, one hundred fifty-seven thousand, one hundred seventy-three".