261223434 has 16 divisors (see below), whose sum is σ = 580496640. Its totient is φ = 87074460.

The previous prime is 261223429. The next prime is 261223451. The reversal of 261223434 is 434322162.

261223434 is a `hidden beast` number, since 2 + 6 + 1 + 223 + 434 = 666.

261223434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 261223398 and 261223407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2418682 + ... + 2418789.

It is an arithmetic number, because the mean of its divisors is an integer number (36281040).

Almost surely, 2^261223434 is an apocalyptic number.

261223434 is an abundant number, since it is smaller than the sum of its proper divisors (319273206).

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

261223434 is a wasteful number, since it uses less digits than its factorization.

261223434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837482 (or 4837476 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 261223434 is about 16162.4080507825. The cubic root of 261223434 is about 639.2499628213.

Adding to 261223434 its reverse (434322162), we get a palindrome (695545596).

The spelling of 261223434 in words is "two hundred sixty-one million, two hundred twenty-three thousand, four hundred thirty-four".