387221107 has 32 divisors (see below), whose sum is σ = 491079680. Its totient is φ = 297198720.

The previous prime is 387221101. The next prime is 387221143. The reversal of 387221107 is 701122783.

It is not a de Polignac number, because 387221107 - 2²⁷ = 253003379 is a prime.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (387221101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438088 + ... + 438970.

It is an arithmetic number, because the mean of its divisors is an integer number (15346240).

Almost surely, 2^387221107 is an apocalyptic number.

387221107 is a deficient number, since it is larger than the sum of its proper divisors (103858573).

387221107 is a wasteful number, since it uses less digits than its factorization.

387221107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 387221107 is about 19677.9345206757. The cubic root of 387221107 is about 728.8749210711.

The spelling of 387221107 in words is "three hundred eighty-seven million, two hundred twenty-one thousand, one hundred seven".