1381223351 has 2 divisors, whose sum is σ = 1381223352. Its totient is φ = 1381223350.

The previous prime is 1381223329. The next prime is 1381223353. The reversal of 1381223351 is 1533221831.

It is a strong prime.

It is an emirp because it is prime and its reverse (1533221831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381223351 - 2⁶ = 1381223287 is a prime.

Together with 1381223353, 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 (1381223353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690611675 + 690611676.

It is an arithmetic number, because the mean of its divisors is an integer number (690611676).

Almost surely, 2^1381223351 is an apocalyptic number.

1381223351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381223351 is an equidigital number, since it uses as much as digits as its factorization.

1381223351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 1381223351 is about 37164.8133454212. The cubic root of 1381223351 is about 1113.6651701167.

The spelling of 1381223351 in words is "one billion, three hundred eighty-one million, two hundred twenty-three thousand, three hundred fifty-one".