261353334 has 16 divisors (see below), whose sum is σ = 570225600. Its totient is φ = 79197960.

The previous prime is 261353329. The next prime is 261353353. The reversal of 261353334 is 433353162.

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, 1979884 + ... + 1980015.

It is an arithmetic number, because the mean of its divisors is an integer number (35639100).

Almost surely, 2^261353334 is an apocalyptic number.

261353334 is an abundant number, since it is smaller than the sum of its proper divisors (308872266).

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

261353334 is a wasteful number, since it uses less digits than its factorization.

261353334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959915.

The product of its digits is 19440, while the sum is 30.

The square root of 261353334 is about 16166.4261356677. The cubic root of 261353334 is about 639.3559063660.

The spelling of 261353334 in words is "two hundred sixty-one million, three hundred fifty-three thousand, three hundred thirty-four".