102219994 has 4 divisors (see below), whose sum is σ = 153329994. Its totient is φ = 51109996.

The previous prime is 102219977. The next prime is 102220007. The reversal of 102219994 is 499912201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 87665769 + 14554225 = 9363^2 + 3815^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25554997 + ... + 25555000.

Almost surely, 2^102219994 is an apocalyptic number.

102219994 is a deficient number, since it is larger than the sum of its proper divisors (51110000).

102219994 is an equidigital number, since it uses as much as digits as its factorization.

102219994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51109999.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 102219994 is about 10110.3903980015. The cubic root of 102219994 is about 467.5685415247.

The spelling of 102219994 in words is "one hundred two million, two hundred nineteen thousand, nine hundred ninety-four".