261164343 has 24 divisors (see below), whose sum is σ = 395967600. Its totient is φ = 152817280.

The previous prime is 261164339. The next prime is 261164381. The reversal of 261164343 is 343461162.

It is not a de Polignac number, because 261164343 - 2² = 261164339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261164343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261164543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1878 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (16498650).

Almost surely, 2^261164343 is an apocalyptic number.

261164343 is a deficient number, since it is larger than the sum of its proper divisors (134803257).

261164343 is a wasteful number, since it uses less digits than its factorization.

261164343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24863 (or 24852 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 261164343 is about 16160.5799091493. The cubic root of 261164343 is about 639.2017578963.

The spelling of 261164343 in words is "two hundred sixty-one million, one hundred sixty-four thousand, three hundred forty-three".