219961628 has 12 divisors (see below), whose sum is σ = 386398320. Its totient is φ = 109562112.

The previous prime is 219961561. The next prime is 219961649. The reversal of 219961628 is 826169912.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 103493 + ... + 105596.

It is an arithmetic number, because the mean of its divisors is an integer number (32199860).

Almost surely, 2^219961628 is an apocalyptic number.

It is an amenable number.

219961628 is a deficient number, since it is larger than the sum of its proper divisors (166436692).

219961628 is a wasteful number, since it uses less digits than its factorization.

219961628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209356 (or 209354 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 219961628 is about 14831.1033979269. The cubic root of 219961628 is about 603.6459739873.

The spelling of 219961628 in words is "two hundred nineteen million, nine hundred sixty-one thousand, six hundred twenty-eight".