212670261 has 36 divisors (see below), whose sum is σ = 323034816. Its totient is φ = 134790480.

The previous prime is 212670257. The next prime is 212670277. The reversal of 212670261 is 162076212.

It is not a de Polignac number, because 212670261 - 2² = 212670257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212670251) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 579300 + ... + 579666.

Almost surely, 2^212670261 is an apocalyptic number.

It is an amenable number.

212670261 is a deficient number, since it is larger than the sum of its proper divisors (110364555).

212670261 is a wasteful number, since it uses less digits than its factorization.

212670261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 212670261 is about 14583.2184719286. The cubic root of 212670261 is about 596.9009288225.

The spelling of 212670261 in words is "two hundred twelve million, six hundred seventy thousand, two hundred sixty-one".