10400215 has 16 divisors (see below), whose sum is σ = 14358528. Its totient is φ = 7083936.

The previous prime is 10400189. The next prime is 10400231. The reversal of 10400215 is 51200401.

It is a cyclic number.

It is not a de Polignac number, because 10400215 - 2¹⁷ = 10269143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10400195 and 10400204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4794 + ... + 6616.

It is an arithmetic number, because the mean of its divisors is an integer number (897408).

Almost surely, 2^10400215 is an apocalyptic number.

10400215 is a deficient number, since it is larger than the sum of its proper divisors (3958313).

10400215 is a wasteful number, since it uses less digits than its factorization.

10400215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 10400215 is about 3224.9364334821. The cubic root of 10400215 is about 218.2800807651.

Adding to 10400215 its reverse (51200401), we get a palindrome (61600616).

The spelling of 10400215 in words is "ten million, four hundred thousand, two hundred fifteen".