1223453251 has 2 divisors, whose sum is σ = 1223453252. Its totient is φ = 1223453250.

The previous prime is 1223453249. The next prime is 1223453279. The reversal of 1223453251 is 1523543221.

It is an a-pointer prime, because the next prime (1223453279) can be obtained adding 1223453251 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (1523543221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223453251 - 2¹ = 1223453249 is a prime.

Together with 1223453249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1223453201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611726625 + 611726626.

It is an arithmetic number, because the mean of its divisors is an integer number (611726626).

Almost surely, 2^1223453251 is an apocalyptic number.

1223453251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223453251 is an equidigital number, since it uses as much as digits as its factorization.

1223453251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 1223453251 is about 34977.8966062855. The cubic root of 1223453251 is about 1069.5369501927.

Adding to 1223453251 its reverse (1523543221), we get a palindrome (2746996472).

The spelling of 1223453251 in words is "one billion, two hundred twenty-three million, four hundred fifty-three thousand, two hundred fifty-one".