223537121 has 2 divisors, whose sum is σ = 223537122. Its totient is φ = 223537120.

The previous prime is 223537103. The next prime is 223537129. The reversal of 223537121 is 121735322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182115025 + 41422096 = 13495^2 + 6436^2 .

It is a cyclic number.

It is not a de Polignac number, because 223537121 - 2¹⁸ = 223274977 is a prime.

It is not a weakly prime, because it can be changed into another prime (223537129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111768560 + 111768561.

It is an arithmetic number, because the mean of its divisors is an integer number (111768561).

Almost surely, 2^223537121 is an apocalyptic number.

It is an amenable number.

223537121 is a deficient number, since it is larger than the sum of its proper divisors (1).

223537121 is an equidigital number, since it uses as much as digits as its factorization.

223537121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 223537121 is about 14951.1578481401. The cubic root of 223537121 is about 606.8991805210.

The spelling of 223537121 in words is "two hundred twenty-three million, five hundred thirty-seven thousand, one hundred twenty-one".