221152619 has 2 divisors, whose sum is σ = 221152620. Its totient is φ = 221152618.

The previous prime is 221152553. The next prime is 221152621. The reversal of 221152619 is 916251122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221152619 - 2¹² = 221148523 is a prime.

It is a super-2 number, since 2×221152619² = 97816961781118322, which contains 22 as substring.

Together with 221152621, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221152591 and 221152600.

It is not a weakly prime, because it can be changed into another prime (221172619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110576309 + 110576310.

It is an arithmetic number, because the mean of its divisors is an integer number (110576310).

Almost surely, 2^221152619 is an apocalyptic number.

221152619 is a deficient number, since it is larger than the sum of its proper divisors (1).

221152619 is an equidigital number, since it uses as much as digits as its factorization.

221152619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 221152619 is about 14871.2009938673. The cubic root of 221152619 is about 604.7335019151.

The spelling of 221152619 in words is "two hundred twenty-one million, one hundred fifty-two thousand, six hundred nineteen".