213406775 has 6 divisors (see below), whose sum is σ = 264624432. Its totient is φ = 170725400.

The previous prime is 213406771. The next prime is 213406789. The reversal of 213406775 is 577604312.

213406775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213406775 - 2² = 213406771 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 (213406771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4268111 + ... + 4268160.

It is an arithmetic number, because the mean of its divisors is an integer number (44104072).

Almost surely, 2^213406775 is an apocalyptic number.

213406775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213406775 is a deficient number, since it is larger than the sum of its proper divisors (51217657).

213406775 is an equidigital number, since it uses as much as digits as its factorization.

213406775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536281 (or 8536276 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 213406775 is about 14608.4487540601. The cubic root of 213406775 is about 597.5891920562.

The spelling of 213406775 in words is "two hundred thirteen million, four hundred six thousand, seven hundred seventy-five".