181481274 has 48 divisors (see below), whose sum is σ = 445754400. Its totient is φ = 52900128.

The previous prime is 181481257. The next prime is 181481291. The reversal of 181481274 is 472184181.

It is an interprime number because it is at equal distance from previous prime (181481257) and next prime (181481291).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15964 + ... + 24855.

It is an arithmetic number, because the mean of its divisors is an integer number (9286550).

Almost surely, 2^181481274 is an apocalyptic number.

181481274 is an abundant number, since it is smaller than the sum of its proper divisors (264273126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181481274 is a wasteful number, since it uses less digits than its factorization.

181481274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40859 (or 40856 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 181481274 is about 13471.4985803362. The cubic root of 181481274 is about 566.1662016544.

The spelling of 181481274 in words is "one hundred eighty-one million, four hundred eighty-one thousand, two hundred seventy-four".