213161775 has 12 divisors (see below), whose sum is σ = 352427592. Its totient is φ = 113686240.

The previous prime is 213161771. The next prime is 213161791. The reversal of 213161775 is 577161312.

It is not a de Polignac number, because 213161775 - 2² = 213161771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213161771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1421004 + ... + 1421153.

It is an arithmetic number, because the mean of its divisors is an integer number (29368966).

Almost surely, 2^213161775 is an apocalyptic number.

213161775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213161775 is a deficient number, since it is larger than the sum of its proper divisors (139265817).

213161775 is a wasteful number, since it uses less digits than its factorization.

213161775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842170 (or 2842165 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 213161775 is about 14600.0607875447. The cubic root of 213161775 is about 597.3604186010.

The spelling of 213161775 in words is "two hundred thirteen million, one hundred sixty-one thousand, seven hundred seventy-five".