213378775 has 12 divisors (see below), whose sum is σ = 265050000. Its totient is φ = 170406080.

The previous prime is 213378773. The next prime is 213378791. The reversal of 213378775 is 577873312.

It is not a de Polignac number, because 213378775 - 2¹ = 213378773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213378773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7851 + ... + 22099.

It is an arithmetic number, because the mean of its divisors is an integer number (22087500).

Almost surely, 2^213378775 is an apocalyptic number.

213378775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213378775 is a deficient number, since it is larger than the sum of its proper divisors (51671225).

213378775 is a wasteful number, since it uses less digits than its factorization.

213378775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14858 (or 14853 counting only the distinct ones).

The product of its digits is 246960, while the sum is 43.

The square root of 213378775 is about 14607.4903730928. The cubic root of 213378775 is about 597.5630553833.

It can be divided in two parts, 2133 and 78775, that added together give a palindrome (80908).

The spelling of 213378775 in words is "two hundred thirteen million, three hundred seventy-eight thousand, seven hundred seventy-five".