172730131 has 8 divisors (see below), whose sum is σ = 199441760. Its totient is φ = 146527488.

The previous prime is 172730113. The next prime is 172730137. The reversal of 172730131 is 131037271.

172730131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172730131 - 2¹⁹ = 172205843 is a prime.

It is a super-2 number, since 2×172730131² = 59671396310554322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172730096 and 172730105.

It is not an unprimeable number, because it can be changed into a prime (172730137) 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, 126516 + ... + 127873.

It is an arithmetic number, because the mean of its divisors is an integer number (24930220).

Almost surely, 2^172730131 is an apocalyptic number.

172730131 is a deficient number, since it is larger than the sum of its proper divisors (26711629).

172730131 is an equidigital number, since it uses as much as digits as its factorization.

172730131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254493.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 172730131 is about 13142.6835539779. The cubic root of 172730131 is about 556.9155797351.

The spelling of 172730131 in words is "one hundred seventy-two million, seven hundred thirty thousand, one hundred thirty-one".