23161356 has 24 divisors (see below), whose sum is σ = 60048240. Its totient is φ = 7720416.

The previous prime is 23161339. The next prime is 23161363. The reversal of 23161356 is 65316132.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107121 + ... + 107336.

It is an arithmetic number, because the mean of its divisors is an integer number (2502010).

Almost surely, 2^23161356 is an apocalyptic number.

It is an amenable number.

23161356 is an abundant number, since it is smaller than the sum of its proper divisors (36886884).

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

23161356 is a wasteful number, since it uses less digits than its factorization.

23161356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214470 (or 214462 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 23161356 is about 4812.6246477364. The cubic root of 23161356 is about 285.0501850683.

Adding to 23161356 its reverse (65316132), we get a palindrome (88477488).

The spelling of 23161356 in words is "twenty-three million, one hundred sixty-one thousand, three hundred fifty-six".