261006343 has 4 divisors (see below), whose sum is σ = 281083768. Its totient is φ = 240928920.

The previous prime is 261006331. The next prime is 261006349. The reversal of 261006343 is 343600162.

261006343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261006343 - 2¹³ = 260998151 is a prime.

It is a super-2 number, since 2×261006343² = 136248622172467298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261006349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10038693 + ... + 10038718.

It is an arithmetic number, because the mean of its divisors is an integer number (70270942).

Almost surely, 2^261006343 is an apocalyptic number.

261006343 is a deficient number, since it is larger than the sum of its proper divisors (20077425).

261006343 is a wasteful number, since it uses less digits than its factorization.

261006343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20077424.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 261006343 is about 16155.6907311325. The cubic root of 261006343 is about 639.0728298173.

The spelling of 261006343 in words is "two hundred sixty-one million, six thousand, three hundred forty-three".