261223433 has 4 divisors (see below), whose sum is σ = 262146768. Its totient is φ = 260300100.

The previous prime is 261223429. The next prime is 261223451. The reversal of 261223433 is 334322162.

261223433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261223433 - 2² = 261223429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261223483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461243 + ... + 461808.

It is an arithmetic number, because the mean of its divisors is an integer number (65536692).

Almost surely, 2^261223433 is an apocalyptic number.

It is an amenable number.

261223433 is a deficient number, since it is larger than the sum of its proper divisors (923335).

261223433 is an equidigital number, since it uses as much as digits as its factorization.

261223433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923334.

The product of its digits is 5184, while the sum is 26.

The square root of 261223433 is about 16162.4080198465. The cubic root of 261223433 is about 639.2499620056.

Adding to 261223433 its reverse (334322162), we get a palindrome (595545595).

The spelling of 261223433 in words is "two hundred sixty-one million, two hundred twenty-three thousand, four hundred thirty-three".