213053761 has 4 divisors (see below), whose sum is σ = 222316992. Its totient is φ = 203790532.

The previous prime is 213053699. The next prime is 213053767. The reversal of 213053761 is 167350312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213053761 - 2¹⁵ = 213020993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213053767) 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, 4631581 + ... + 4631626.

It is an arithmetic number, because the mean of its divisors is an integer number (55579248).

Almost surely, 2^213053761 is an apocalyptic number.

It is an amenable number.

213053761 is a deficient number, since it is larger than the sum of its proper divisors (9263231).

213053761 is an equidigital number, since it uses as much as digits as its factorization.

213053761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9263230.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 213053761 is about 14596.3612246340. The cubic root of 213053761 is about 597.2595027750.

The spelling of 213053761 in words is "two hundred thirteen million, fifty-three thousand, seven hundred sixty-one".