23223157 has 2 divisors, whose sum is σ = 23223158. Its totient is φ = 23223156.

The previous prime is 23223143. The next prime is 23223181. The reversal of 23223157 is 75132232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15163236 + 8059921 = 3894^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 23223157 - 2¹¹ = 23221109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23223107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11611578 + 11611579.

It is an arithmetic number, because the mean of its divisors is an integer number (11611579).

Almost surely, 2^23223157 is an apocalyptic number.

It is an amenable number.

23223157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23223157 is an equidigital number, since it uses as much as digits as its factorization.

23223157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 25.

The square root of 23223157 is about 4819.0410871874. The cubic root of 23223157 is about 285.3034912102.

Adding to 23223157 its reverse (75132232), we get a palindrome (98355389).

The spelling of 23223157 in words is "twenty-three million, two hundred twenty-three thousand, one hundred fifty-seven".