11219391 has 10 divisors (see below), whose sum is σ = 16759952. Its totient is φ = 7479540.

The previous prime is 11219389. The next prime is 11219393. The reversal of 11219391 is 19391211.

It is an interprime number because it is at equal distance from previous prime (11219389) and next prime (11219393).

It is not a de Polignac number, because 11219391 - 2¹ = 11219389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11219393) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 69175 + ... + 69336.

Almost surely, 2^11219391 is an apocalyptic number.

11219391 is a deficient number, since it is larger than the sum of its proper divisors (5540561).

11219391 is an equidigital number, since it uses as much as digits as its factorization.

11219391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138523 (or 138514 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 11219391 is about 3349.5359380069. The cubic root of 11219391 is about 223.8668359775.

It can be divided in two parts, 112 and 19391, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 11219391 in words is "eleven million, two hundred nineteen thousand, three hundred ninety-one".