10219905 has 16 divisors (see below), whose sum is σ = 18168960. Its totient is φ = 5450544.

The previous prime is 10219903. The next prime is 10219933. The reversal of 10219905 is 50991201.

It is a happy number.

10219905 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10219905 - 2¹ = 10219903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (10219903) 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, 37717 + ... + 37986.

It is an arithmetic number, because the mean of its divisors is an integer number (1135560).

Almost surely, 2^10219905 is an apocalyptic number.

10219905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10219905 is a deficient number, since it is larger than the sum of its proper divisors (7949055).

10219905 is an equidigital number, since it uses as much as digits as its factorization.

10219905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75717 (or 75711 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 10219905 is about 3196.8586143275. The cubic root of 10219905 is about 217.0112688549.

The spelling of 10219905 in words is "ten million, two hundred nineteen thousand, nine hundred five".