223531949 has 2 divisors, whose sum is σ = 223531950. Its totient is φ = 223531948.

The previous prime is 223531937. The next prime is 223531951. The reversal of 223531949 is 949135322.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216295849 + 7236100 = 14707^2 + 2690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223531949 is a prime.

Together with 223531951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223531909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111765974 + 111765975.

It is an arithmetic number, because the mean of its divisors is an integer number (111765975).

Almost surely, 2^223531949 is an apocalyptic number.

It is an amenable number.

223531949 is a deficient number, since it is larger than the sum of its proper divisors (1).

223531949 is an equidigital number, since it uses as much as digits as its factorization.

223531949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 223531949 is about 14950.9848839466. The cubic root of 223531949 is about 606.8944998565.

The spelling of 223531949 in words is "two hundred twenty-three million, five hundred thirty-one thousand, nine hundred forty-nine".