73172130 has 16 divisors (see below), whose sum is σ = 175613184. Its totient is φ = 19512560.

The previous prime is 73172117. The next prime is 73172137. The reversal of 73172130 is 3127137.

It is a self number, because there is not a number n which added to its sum of digits gives 73172130.

It is not an unprimeable number, because it can be changed into a prime (73172137) 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, 1219506 + ... + 1219565.

It is an arithmetic number, because the mean of its divisors is an integer number (10975824).

Almost surely, 2^73172130 is an apocalyptic number.

73172130 is an abundant number, since it is smaller than the sum of its proper divisors (102441054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73172130 is a wasteful number, since it uses less digits than its factorization.

73172130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439081.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 73172130 is about 8554.0709606596. The cubic root of 73172130 is about 418.2621502172.

Adding to 73172130 its reverse (3127137), we get a palindrome (76299267).

The spelling of 73172130 in words is "seventy-three million, one hundred seventy-two thousand, one hundred thirty".