105215385 has 16 divisors (see below), whose sum is σ = 183648960. Its totient is φ = 51013440.

The previous prime is 105215381. The next prime is 105215387. The reversal of 105215385 is 583512501.

It is not a de Polignac number, because 105215385 - 2² = 105215381 is a prime.

It is a super-2 number, since 2×105215385² = 22140554481396450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105215381) 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, 318670 + ... + 318999.

It is an arithmetic number, because the mean of its divisors is an integer number (11478060).

Almost surely, 2^105215385 is an apocalyptic number.

105215385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

105215385 is a deficient number, since it is larger than the sum of its proper divisors (78433575).

105215385 is a wasteful number, since it uses less digits than its factorization.

105215385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637688.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 105215385 is about 10257.4550937355. The cubic root of 105215385 is about 472.0917556584.

Adding to 105215385 its reverse (583512501), we get a palindrome (688727886).

The spelling of 105215385 in words is "one hundred five million, two hundred fifteen thousand, three hundred eighty-five".