261324212 has 12 divisors (see below), whose sum is σ = 460656420. Its totient is φ = 129708096.

The previous prime is 261324209. The next prime is 261324223. The reversal of 261324212 is 212423162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 211818916 + 49505296 = 14554^2 + 7036^2 .

It is a congruent number.

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, 237887 + ... + 238982.

It is an arithmetic number, because the mean of its divisors is an integer number (38388035).

Almost surely, 2^261324212 is an apocalyptic number.

It is an amenable number.

261324212 is a deficient number, since it is larger than the sum of its proper divisors (199332208).

261324212 is a wasteful number, since it uses less digits than its factorization.

261324212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477010 (or 477008 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 261324212 is about 16165.5254167627. The cubic root of 261324212 is about 639.3321581652.

Adding to 261324212 its reverse (212423162), we get a palindrome (473747374).

The spelling of 261324212 in words is "two hundred sixty-one million, three hundred twenty-four thousand, two hundred twelve".