261225182 has 8 divisors (see below), whose sum is σ = 391922400. Its totient is φ = 130584384.

The previous prime is 261225163. The next prime is 261225197. The reversal of 261225182 is 281522162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494 + ... + 22862.

It is an arithmetic number, because the mean of its divisors is an integer number (48990300).

Almost surely, 2^261225182 is an apocalyptic number.

261225182 is a deficient number, since it is larger than the sum of its proper divisors (130697218).

261225182 is a wasteful number, since it uses less digits than its factorization.

261225182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28210.

The product of its digits is 3840, while the sum is 29.

The square root of 261225182 is about 16162.4621267924. The cubic root of 261225182 is about 639.2513886843.

The spelling of 261225182 in words is "two hundred sixty-one million, two hundred twenty-five thousand, one hundred eighty-two".