102556213 has 4 divisors (see below), whose sum is σ = 103708620. Its totient is φ = 101403808.

The previous prime is 102556199. The next prime is 102556283. The reversal of 102556213 is 312655201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8427409 + 94128804 = 2903^2 + 9702^2 .

It is a cyclic number.

It is not a de Polignac number, because 102556213 - 2¹³ = 102548021 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 (102556283) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 576070 + ... + 576247.

It is an arithmetic number, because the mean of its divisors is an integer number (25927155).

Almost surely, 2^102556213 is an apocalyptic number.

It is an amenable number.

102556213 is a deficient number, since it is larger than the sum of its proper divisors (1152407).

102556213 is an equidigital number, since it uses as much as digits as its factorization.

102556213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152406.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 102556213 is about 10127.0041473281. The cubic root of 102556213 is about 468.0806180670.

The spelling of 102556213 in words is "one hundred two million, five hundred fifty-six thousand, two hundred thirteen".