261010212 has 12 divisors (see below), whose sum is σ = 609023856. Its totient is φ = 87003400.

The previous prime is 261010193. The next prime is 261010229. The reversal of 261010212 is 212010162.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 261010191 and 261010200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10875414 + ... + 10875437.

It is an arithmetic number, because the mean of its divisors is an integer number (50751988).

Almost surely, 2^261010212 is an apocalyptic number.

It is an amenable number.

261010212 is an abundant number, since it is smaller than the sum of its proper divisors (348013644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261010212 is a wasteful number, since it uses less digits than its factorization.

261010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21750858 (or 21750856 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 261010212 is about 16155.8104717776. The cubic root of 261010212 is about 639.0759875446.

Adding to 261010212 its reverse (212010162), we get a palindrome (473020374).

Subtracting from 261010212 its reverse (212010162), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 261010212 in words is "two hundred sixty-one million, ten thousand, two hundred twelve".