212661365 has 16 divisors (see below), whose sum is σ = 292135680. Its totient is φ = 145582080.

The previous prime is 212661353. The next prime is 212661377. The reversal of 212661365 is 563166212.

It is an interprime number because it is at equal distance from previous prime (212661353) and next prime (212661377).

It is not a de Polignac number, because 212661365 - 2⁴ = 212661349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17696 + ... + 27174.

It is an arithmetic number, because the mean of its divisors is an integer number (18258480).

Almost surely, 2^212661365 is an apocalyptic number.

It is an amenable number.

212661365 is a deficient number, since it is larger than the sum of its proper divisors (79474315).

212661365 is an equidigital number, since it uses as much as digits as its factorization.

212661365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10132.

The product of its digits is 12960, while the sum is 32.

The square root of 212661365 is about 14582.9134606223. The cubic root of 212661365 is about 596.8926059151.

The spelling of 212661365 in words is "two hundred twelve million, six hundred sixty-one thousand, three hundred sixty-five".