111223157 has 2 divisors, whose sum is σ = 111223158. Its totient is φ = 111223156.

The previous prime is 111223153. The next prime is 111223223. The reversal of 111223157 is 751322111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111218116 + 5041 = 10546^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 111223157 - 2² = 111223153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111223153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611578 + 55611579.

It is an arithmetic number, because the mean of its divisors is an integer number (55611579).

Almost surely, 2^111223157 is an apocalyptic number.

It is an amenable number.

111223157 is a deficient number, since it is larger than the sum of its proper divisors (1).

111223157 is an equidigital number, since it uses as much as digits as its factorization.

111223157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 111223157 is about 10546.2389978608. The cubic root of 111223157 is about 480.9114006154.

Adding to 111223157 its reverse (751322111), we get a palindrome (862545268).

The spelling of 111223157 in words is "one hundred eleven million, two hundred twenty-three thousand, one hundred fifty-seven".