221961410 has 16 divisors (see below), whose sum is σ = 435851712. Its totient is φ = 80713200.

The previous prime is 221961379. The next prime is 221961463. The reversal of 221961410 is 14169122.

It is a self number, because there is not a number n which added to its sum of digits gives 221961410.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008806 + ... + 1009025.

It is an arithmetic number, because the mean of its divisors is an integer number (27240732).

Almost surely, 2^221961410 is an apocalyptic number.

221961410 is a deficient number, since it is larger than the sum of its proper divisors (213890302).

221961410 is a wasteful number, since it uses less digits than its factorization.

221961410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017849.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 221961410 is about 14898.3693738610. The cubic root of 221961410 is about 605.4698078824.

The spelling of 221961410 in words is "two hundred twenty-one million, nine hundred sixty-one thousand, four hundred ten".