219897051 has 24 divisors (see below), whose sum is σ = 339245760. Its totient is φ = 126252720.

The previous prime is 219897001. The next prime is 219897061. The reversal of 219897051 is 150798912.

It is not a de Polignac number, because 219897051 - 2¹⁹ = 219372763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 219896994 and 219897012.

It is not an unprimeable number, because it can be changed into a prime (219897001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9045 + ... + 22838.

It is an arithmetic number, because the mean of its divisors is an integer number (14135240).

Almost surely, 2^219897051 is an apocalyptic number.

219897051 is a deficient number, since it is larger than the sum of its proper divisors (119348709).

219897051 is a wasteful number, since it uses less digits than its factorization.

219897051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31927 (or 31916 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 219897051 is about 14828.9261580197. The cubic root of 219897051 is about 603.5868948018.

The spelling of 219897051 in words is "two hundred nineteen million, eight hundred ninety-seven thousand, fifty-one".