213031775 has 12 divisors (see below), whose sum is σ = 288174264. Its totient is φ = 154932000.

The previous prime is 213031771. The next prime is 213031787. The reversal of 213031775 is 577130312.

It is not a de Polignac number, because 213031775 - 2² = 213031771 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 (213031771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387056 + ... + 387605.

It is an arithmetic number, because the mean of its divisors is an integer number (24014522).

Almost surely, 2^213031775 is an apocalyptic number.

213031775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213031775 is a deficient number, since it is larger than the sum of its proper divisors (75142489).

213031775 is a wasteful number, since it uses less digits than its factorization.

213031775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774682 (or 774677 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 213031775 is about 14595.6080722935. The cubic root of 213031775 is about 597.2389574142.

The spelling of 213031775 in words is "two hundred thirteen million, thirty-one thousand, seven hundred seventy-five".