181481974 has 8 divisors (see below), whose sum is σ = 272532528. Its totient is φ = 90637800.

The previous prime is 181481969. The next prime is 181481999. The reversal of 181481974 is 479184181.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 181481974.

It is a congruent number.

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, 49377 + ... + 52924.

It is an arithmetic number, because the mean of its divisors is an integer number (34066566).

Almost surely, 2^181481974 is an apocalyptic number.

181481974 is a deficient number, since it is larger than the sum of its proper divisors (91050554).

181481974 is a wasteful number, since it uses less digits than its factorization.

181481974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103190.

The product of its digits is 64512, while the sum is 43.

The square root of 181481974 is about 13471.5245610881. The cubic root of 181481974 is about 566.1669295823.

The spelling of 181481974 in words is "one hundred eighty-one million, four hundred eighty-one thousand, nine hundred seventy-four".