181021030 has 8 divisors (see below), whose sum is σ = 325837872. Its totient is φ = 72408408.

The previous prime is 181021021. The next prime is 181021039. The reversal of 181021030 is 30120181.

It is an interprime number because it is at equal distance from previous prime (181021021) and next prime (181021039).

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

It is a super-2 number, since 2×181021030² = 65537226604521800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181020995 and 181021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181021039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9051042 + ... + 9051061.

It is an arithmetic number, because the mean of its divisors is an integer number (40729734).

Almost surely, 2^181021030 is an apocalyptic number.

181021030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181021030 is a deficient number, since it is larger than the sum of its proper divisors (144816842).

181021030 is a wasteful number, since it uses less digits than its factorization.

181021030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18102110.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 181021030 is about 13454.4055981675. The cubic root of 181021030 is about 565.6871895440.

The spelling of 181021030 in words is "one hundred eighty-one million, twenty-one thousand, thirty".