130206178 has 4 divisors (see below), whose sum is σ = 195309270. Its totient is φ = 65103088.

The previous prime is 130206173. The next prime is 130206187. The reversal of 130206178 is 871602031.

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

It can be written as a sum of positive squares in only one way, i.e., 117007489 + 13198689 = 10817^2 + 3633^2 .

It is not an unprimeable number, because it can be changed into a prime (130206173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32551543 + ... + 32551546.

Almost surely, 2^130206178 is an apocalyptic number.

130206178 is a deficient number, since it is larger than the sum of its proper divisors (65103092).

130206178 is an equidigital number, since it uses as much as digits as its factorization.

130206178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65103091.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 130206178 is about 11410.7921723253. The cubic root of 130206178 is about 506.8473696588.

The spelling of 130206178 in words is "one hundred thirty million, two hundred six thousand, one hundred seventy-eight".