261443214 has 48 divisors (see below), whose sum is σ = 589640688. Its totient is φ = 86821632.

The previous prime is 261443201. The next prime is 261443239. The reversal of 261443214 is 412344162.

It is a happy number.

261443214 is a `hidden beast` number, since 2 + 6 + 1 + 443 + 214 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153214 + ... + 154910.

It is an arithmetic number, because the mean of its divisors is an integer number (12284181).

Almost surely, 2^261443214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261443214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294820344).

261443214 is an abundant number, since it is smaller than the sum of its proper divisors (328197474).

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

261443214 is a wasteful number, since it uses less digits than its factorization.

261443214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2019 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 261443214 is about 16169.2057318843. The cubic root of 261443214 is about 639.4291899444.

Adding to 261443214 its reverse (412344162), we get a palindrome (673787376).

The spelling of 261443214 in words is "two hundred sixty-one million, four hundred forty-three thousand, two hundred fourteen".