102213391 has 16 divisors (see below), whose sum is σ = 121107456. Its totient is φ = 84449376.

The previous prime is 102213383. The next prime is 102213413. The reversal of 102213391 is 193312201.

It is a cyclic number.

It is not a de Polignac number, because 102213391 - 2³ = 102213383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102213301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19725 + ... + 24361.

It is an arithmetic number, because the mean of its divisors is an integer number (7569216).

Almost surely, 2^102213391 is an apocalyptic number.

102213391 is a deficient number, since it is larger than the sum of its proper divisors (18894065).

102213391 is an equidigital number, since it uses as much as digits as its factorization.

102213391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 102213391 is about 10110.0638474740. The cubic root of 102213391 is about 467.5584736262.

Adding to 102213391 its reverse (193312201), we get a palindrome (295525592).

The spelling of 102213391 in words is "one hundred two million, two hundred thirteen thousand, three hundred ninety-one".