23156261 has 8 divisors (see below), whose sum is σ = 24935040. Its totient is φ = 21423808.

The previous prime is 23156249. The next prime is 23156293. The reversal of 23156261 is 16265132.

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

It is not a de Polignac number, because 23156261 - 2¹⁸ = 22894117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23156261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10541 + ... + 12546.

It is an arithmetic number, because the mean of its divisors is an integer number (3116880).

Almost surely, 2^23156261 is an apocalyptic number.

It is an amenable number.

23156261 is a deficient number, since it is larger than the sum of its proper divisors (1778779).

23156261 is a wasteful number, since it uses less digits than its factorization.

23156261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23163.

The product of its digits is 2160, while the sum is 26.

The square root of 23156261 is about 4812.0952816834. The cubic root of 23156261 is about 285.0292818995.

The spelling of 23156261 in words is "twenty-three million, one hundred fifty-six thousand, two hundred sixty-one".