1381144351 has 4 divisors (see below), whose sum is σ = 1381244832. Its totient is φ = 1381043872.

The previous prime is 1381144313. The next prime is 1381144367. The reversal of 1381144351 is 1534411831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1381144351 - 2⁷ = 1381144223 is a prime.

It is a super-2 number, since 2×1381144351² = 3815119436598422402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381141351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25591 + ... + 58456.

It is an arithmetic number, because the mean of its divisors is an integer number (345311208).

Almost surely, 2^1381144351 is an apocalyptic number.

1381144351 is a deficient number, since it is larger than the sum of its proper divisors (100481).

1381144351 is an equidigital number, since it uses as much as digits as its factorization.

1381144351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100480.

The product of its digits is 5760, while the sum is 31.

The square root of 1381144351 is about 37163.7504969560. The cubic root of 1381144351 is about 1113.6439374353.

The spelling of 1381144351 in words is "one billion, three hundred eighty-one million, one hundred forty-four thousand, three hundred fifty-one".