23161251 has 8 divisors (see below), whose sum is σ = 31011840. Its totient is φ = 15375752.

The previous prime is 23161249. The next prime is 23161267. The reversal of 23161251 is 15216132.

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

It is a cyclic number.

It is not a de Polignac number, because 23161251 - 2¹ = 23161249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23161241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15435 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (3876480).

Almost surely, 2^23161251 is an apocalyptic number.

23161251 is a deficient number, since it is larger than the sum of its proper divisors (7850589).

23161251 is a wasteful number, since it uses less digits than its factorization.

23161251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32545.

The product of its digits is 360, while the sum is 21.

The square root of 23161251 is about 4812.6137389157. The cubic root of 23161251 is about 285.0497543176.

Adding to 23161251 its reverse (15216132), we get a palindrome (38377383).

The spelling of 23161251 in words is "twenty-three million, one hundred sixty-one thousand, two hundred fifty-one".