381257212 has 12 divisors (see below), whose sum is σ = 762514480. Its totient is φ = 163395936.

The previous prime is 381257209. The next prime is 381257243. The reversal of 381257212 is 212752183.

381257212 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6808137 + ... + 6808192.

Almost surely, 2^381257212 is an apocalyptic number.

It is an amenable number.

381257212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

381257212 is a wasteful number, since it uses less digits than its factorization.

381257212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616340 (or 13616338 counting only the distinct ones).

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

The square root of 381257212 is about 19525.8088692889. The cubic root of 381257212 is about 725.1135530422.

The spelling of 381257212 in words is "three hundred eighty-one million, two hundred fifty-seven thousand, two hundred twelve".