10219855 has 4 divisors (see below), whose sum is σ = 12263832. Its totient is φ = 8175880.

The previous prime is 10219841. The next prime is 10219877. The reversal of 10219855 is 55891201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55891201 = 37 ⋅1510573.

It is not a de Polignac number, because 10219855 - 2¹⁷ = 10088783 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021981 + ... + 1021990.

It is an arithmetic number, because the mean of its divisors is an integer number (3065958).

Almost surely, 2^10219855 is an apocalyptic number.

10219855 is a deficient number, since it is larger than the sum of its proper divisors (2043977).

10219855 is an equidigital number, since it uses as much as digits as its factorization.

10219855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043976.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 10219855 is about 3196.8507941410. The cubic root of 10219855 is about 217.0109149514.

The spelling of 10219855 in words is "ten million, two hundred nineteen thousand, eight hundred fifty-five".