10561215 has 24 divisors (see below), whose sum is σ = 19658160. Its totient is φ = 4827648.

The previous prime is 10561211. The next prime is 10561219. The reversal of 10561215 is 51216501.

10561215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10561211) and next prime (10561219).

It is not a de Polignac number, because 10561215 - 2² = 10561211 is a prime.

It is a super-2 number, since 2×10561215² = 223078524552450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 10561191 and 10561200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10561211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6450 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (819090).

Almost surely, 2^10561215 is an apocalyptic number.

10561215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10561215 is a deficient number, since it is larger than the sum of its proper divisors (9096945).

10561215 is a wasteful number, since it uses less digits than its factorization.

10561215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14391 (or 14384 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 10561215 is about 3249.8023016793. The cubic root of 10561215 is about 219.4006759665.

Adding to 10561215 its reverse (51216501), we get a palindrome (61777716).

The spelling of 10561215 in words is "ten million, five hundred sixty-one thousand, two hundred fifteen".