181216130 has 8 divisors (see below), whose sum is σ = 326189052. Its totient is φ = 72486448.

The previous prime is 181216117. The next prime is 181216153. The reversal of 181216130 is 31612181.

It can be written as a sum of positive squares in 2 ways, for example, as 150822961 + 30393169 = 12281^2 + 5513^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 181216096 and 181216105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9060797 + ... + 9060816.

Almost surely, 2^181216130 is an apocalyptic number.

181216130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181216130 is a deficient number, since it is larger than the sum of its proper divisors (144972922).

181216130 is a wasteful number, since it uses less digits than its factorization.

181216130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18121620.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 181216130 is about 13461.6540588443. The cubic root of 181216130 is about 565.8903444751.

The spelling of 181216130 in words is "one hundred eighty-one million, two hundred sixteen thousand, one hundred thirty".