261223432 has 32 divisors (see below), whose sum is σ = 502951680. Its totient is φ = 127142080.

The previous prime is 261223429. The next prime is 261223451. The reversal of 261223432 is 234322162.

It is a junction number, because it is equal to n+sod(n) for n = 261223397 and 261223406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53193 + ... + 57895.

It is an arithmetic number, because the mean of its divisors is an integer number (15717240).

Almost surely, 2^261223432 is an apocalyptic number.

It is an amenable number.

261223432 is a deficient number, since it is larger than the sum of its proper divisors (241728248).

261223432 is a wasteful number, since it uses less digits than its factorization.

261223432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893 (or 4889 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 261223432 is about 16162.4079889106. The cubic root of 261223432 is about 639.2499611899.

Adding to 261223432 its reverse (234322162), we get a palindrome (495545594).

The spelling of 261223432 in words is "two hundred sixty-one million, two hundred twenty-three thousand, four hundred thirty-two".