381532554 has 48 divisors (see below), whose sum is σ = 901555200. Its totient is φ = 115903008.

The previous prime is 381532553. The next prime is 381532577. The reversal of 381532554 is 455235183.

It is not an unprimeable number, because it can be changed into a prime (381532553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8167 + ... + 28805.

It is an arithmetic number, because the mean of its divisors is an integer number (18782400).

Almost surely, 2^381532554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381532554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450777600).

381532554 is an abundant number, since it is smaller than the sum of its proper divisors (520022646).

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

381532554 is a wasteful number, since it uses less digits than its factorization.

381532554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20739 (or 20736 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 381532554 is about 19532.8583161810. The cubic root of 381532554 is about 725.2880687985.

The spelling of 381532554 in words is "three hundred eighty-one million, five hundred thirty-two thousand, five hundred fifty-four".