10615221 has 12 divisors (see below), whose sum is σ = 15593760. Its totient is φ = 6956520.

The previous prime is 10615219. The next prime is 10615249. The reversal of 10615221 is 12251601.

It is not a de Polignac number, because 10615221 - 2¹ = 10615219 is a prime.

It is a super-2 number, since 2×10615221² = 225365833757682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10615194 and 10615203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10615261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9465 + ... + 10526.

It is an arithmetic number, because the mean of its divisors is an integer number (1299480).

Almost surely, 2^10615221 is an apocalyptic number.

It is an amenable number.

10615221 is a deficient number, since it is larger than the sum of its proper divisors (4978539).

10615221 is a wasteful number, since it uses less digits than its factorization.

10615221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20056 (or 20053 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 10615221 is about 3258.1008271691. The cubic root of 10615221 is about 219.7740172626.

Adding to 10615221 its reverse (12251601), we get a palindrome (22866822).

The spelling of 10615221 in words is "ten million, six hundred fifteen thousand, two hundred twenty-one".