381421500 has 48 divisors (see below), whose sum is σ = 1110703776. Its totient is φ = 101712000.

The previous prime is 381421499. The next prime is 381421501. The reversal of 381421500 is 5124183.

It is an interprime number because it is at equal distance from previous prime (381421499) and next prime (381421501).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381421501) 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, 125641 + ... + 128640.

It is an arithmetic number, because the mean of its divisors is an integer number (23139662).

Almost surely, 2^381421500 is an apocalyptic number.

381421500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381421500 is an abundant number, since it is smaller than the sum of its proper divisors (729282276).

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

381421500 is a wasteful number, since it uses less digits than its factorization.

381421500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254303 (or 254291 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 381421500 is about 19530.0153609771. The cubic root of 381421500 is about 725.2176912676.

Adding to 381421500 its reverse (5124183), we get a palindrome (386545683).

The spelling of 381421500 in words is "three hundred eighty-one million, four hundred twenty-one thousand, five hundred".