381721054 has 32 divisors (see below), whose sum is σ = 677214720. Its totient is φ = 159084000.

The previous prime is 381721033. The next prime is 381721057. The reversal of 381721054 is 450127183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381721057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38767 + ... + 47605.

It is an arithmetic number, because the mean of its divisors is an integer number (21162960).

Almost surely, 2^381721054 is an apocalyptic number.

381721054 is a deficient number, since it is larger than the sum of its proper divisors (295493666).

381721054 is a wasteful number, since it uses less digits than its factorization.

381721054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 381721054 is about 19537.6829230080. The cubic root of 381721054 is about 725.4074944240.

The spelling of 381721054 in words is "three hundred eighty-one million, seven hundred twenty-one thousand, fifty-four".