219245961 has 16 divisors (see below), whose sum is σ = 319227840. Its totient is φ = 132741120.

The previous prime is 219245927. The next prime is 219245969. The reversal of 219245961 is 169542912.

It is not a de Polignac number, because 219245961 - 2⁷ = 219245833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219245969) 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 15 ways as a sum of consecutive naturals, for example, 36585 + ... + 42153.

It is an arithmetic number, because the mean of its divisors is an integer number (19951740).

Almost surely, 2^219245961 is an apocalyptic number.

It is an amenable number.

219245961 is a deficient number, since it is larger than the sum of its proper divisors (99981879).

219245961 is a wasteful number, since it uses less digits than its factorization.

219245961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776.

The product of its digits is 38880, while the sum is 39.

The square root of 219245961 is about 14806.9565069936. The cubic root of 219245961 is about 602.9905886449.

The spelling of 219245961 in words is "two hundred nineteen million, two hundred forty-five thousand, nine hundred sixty-one".