212764561 has 8 divisors (see below), whose sum is σ = 223833600. Its totient is φ = 201944400.

The previous prime is 212764481. The next prime is 212764577. The reversal of 212764561 is 165467212.

212764561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212764561 - 2¹⁷ = 212633489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212764361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60465 + ... + 63886.

It is an arithmetic number, because the mean of its divisors is an integer number (27979200).

Almost surely, 2^212764561 is an apocalyptic number.

It is an amenable number.

212764561 is a deficient number, since it is larger than the sum of its proper divisors (11069039).

212764561 is a wasteful number, since it uses less digits than its factorization.

212764561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124439.

The product of its digits is 20160, while the sum is 34.

The square root of 212764561 is about 14586.4512819260. The cubic root of 212764561 is about 596.9891396203.

The spelling of 212764561 in words is "two hundred twelve million, seven hundred sixty-four thousand, five hundred sixty-one".