261214556 has 24 divisors (see below), whose sum is σ = 472571904. Its totient is φ = 126206640.

The previous prime is 261214531. The next prime is 261214573. The reversal of 261214556 is 655412162.

It is a congruent number.

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, 120821 + ... + 122963.

It is an arithmetic number, because the mean of its divisors is an integer number (19690496).

Almost surely, 2^261214556 is an apocalyptic number.

It is an amenable number.

261214556 is a deficient number, since it is larger than the sum of its proper divisors (211357348).

261214556 is a wasteful number, since it uses less digits than its factorization.

261214556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161 (or 3159 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 261214556 is about 16162.1333987812. The cubic root of 261214556 is about 639.2427208403.

The spelling of 261214556 in words is "two hundred sixty-one million, two hundred fourteen thousand, five hundred fifty-six".