102228691 has 4 divisors (see below), whose sum is σ = 102486592. Its totient is φ = 101970792.

The previous prime is 102228671. The next prime is 102228697. The reversal of 102228691 is 196822201.

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

It is a cyclic number.

It is not a de Polignac number, because 102228691 - 2¹¹ = 102226643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102228697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128355 + ... + 129148.

It is an arithmetic number, because the mean of its divisors is an integer number (25621648).

Almost surely, 2^102228691 is an apocalyptic number.

102228691 is a deficient number, since it is larger than the sum of its proper divisors (257901).

102228691 is an equidigital number, since it uses as much as digits as its factorization.

102228691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257900.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 102228691 is about 10110.8204909394. The cubic root of 102228691 is about 467.5818015799.

The spelling of 102228691 in words is "one hundred two million, two hundred twenty-eight thousand, six hundred ninety-one".