181214385 has 16 divisors (see below), whose sum is σ = 316301760. Its totient is φ = 87861440.

The previous prime is 181214377. The next prime is 181214393. The reversal of 181214385 is 583412181.

181214385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (181214377) and next prime (181214393).

It is not a de Polignac number, because 181214385 - 2³ = 181214377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548970 + ... + 549299.

It is an arithmetic number, because the mean of its divisors is an integer number (19768860).

Almost surely, 2^181214385 is an apocalyptic number.

181214385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181214385 is a deficient number, since it is larger than the sum of its proper divisors (135087375).

181214385 is a wasteful number, since it uses less digits than its factorization.

181214385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098288.

The product of its digits is 7680, while the sum is 33.

The square root of 181214385 is about 13461.5892449592. The cubic root of 181214385 is about 565.8885280772. Note that the first 3 decimals are identical.

The spelling of 181214385 in words is "one hundred eighty-one million, two hundred fourteen thousand, three hundred eighty-five".