1378222191 has 6 divisors (see below), whose sum is σ = 1990765400. Its totient is φ = 918814788.

The previous prime is 1378222177. The next prime is 1378222199. The reversal of 1378222191 is 1912228731.

It is not a de Polignac number, because 1378222191 - 2⁵ = 1378222159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378222199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76567891 + ... + 76567908.

Almost surely, 2^1378222191 is an apocalyptic number.

1378222191 is a deficient number, since it is larger than the sum of its proper divisors (612543209).

1378222191 is a wasteful number, since it uses less digits than its factorization.

1378222191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153135805 (or 153135802 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1378222191 is about 37124.4150256943. The cubic root of 1378222191 is about 1112.8579844616.

The spelling of 1378222191 in words is "one billion, three hundred seventy-eight million, two hundred twenty-two thousand, one hundred ninety-one".