221162899 has 2 divisors, whose sum is σ = 221162900. Its totient is φ = 221162898.

The previous prime is 221162891. The next prime is 221162957. The reversal of 221162899 is 998261122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221162899 - 2³ = 221162891 is a prime.

It is equal to p_12182998 and since 221162899 and 12182998 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (221162891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110581449 + 110581450.

It is an arithmetic number, because the mean of its divisors is an integer number (110581450).

Almost surely, 2^221162899 is an apocalyptic number.

221162899 is a deficient number, since it is larger than the sum of its proper divisors (1).

221162899 is an equidigital number, since it uses as much as digits as its factorization.

221162899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The square root of 221162899 is about 14871.5466243427. The cubic root of 221162899 is about 604.7428718607.

The spelling of 221162899 in words is "two hundred twenty-one million, one hundred sixty-two thousand, eight hundred ninety-nine".