219942057 has 8 divisors (see below), whose sum is σ = 295495200. Its totient is φ = 145508480.

The previous prime is 219942049. The next prime is 219942067. The reversal of 219942057 is 750249912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 219942057 - 2³ = 219942049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219942017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279432 + ... + 280217.

It is an arithmetic number, because the mean of its divisors is an integer number (36936900).

Almost surely, 2^219942057 is an apocalyptic number.

It is an amenable number.

219942057 is a deficient number, since it is larger than the sum of its proper divisors (75553143).

219942057 is a wasteful number, since it uses less digits than its factorization.

219942057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559783.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 219942057 is about 14830.4435874319. The cubic root of 219942057 is about 603.6280704013.

The spelling of 219942057 in words is "two hundred nineteen million, nine hundred forty-two thousand, fifty-seven".