387215113 has 8 divisors (see below), whose sum is σ = 391514760. Its totient is φ = 382924800.

The previous prime is 387215107. The next prime is 387215149. The reversal of 387215113 is 311512783.

It can be written as a sum of positive squares in 4 ways, for example, as 227529 + 386987584 = 477^2 + 19672^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387215113 - 2⁹ = 387214601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387215813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110281 + ... + 113737.

It is an arithmetic number, because the mean of its divisors is an integer number (48939345).

Almost surely, 2^387215113 is an apocalyptic number.

It is an amenable number.

387215113 is a deficient number, since it is larger than the sum of its proper divisors (4299647).

387215113 is a wasteful number, since it uses less digits than its factorization.

387215113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667.

The product of its digits is 5040, while the sum is 31.

The square root of 387215113 is about 19677.7822175163. The cubic root of 387215113 is about 728.8711601718.

Adding to 387215113 its reverse (311512783), we get a palindrome (698727896).

It can be divided in two parts, 38721 and 5113, that added together give a palindrome (43834).

The spelling of 387215113 in words is "three hundred eighty-seven million, two hundred fifteen thousand, one hundred thirteen".