1219892231 has 2 divisors, whose sum is σ = 1219892232. Its totient is φ = 1219892230.

The previous prime is 1219892203. The next prime is 1219892281. The reversal of 1219892231 is 1322989121.

It is a weak prime.

It is an emirp because it is prime and its reverse (1322989121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1219892231 is a prime.

It is a super-2 number, since 2×1219892231² = 2976274110508314722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219892281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609946115 + 609946116.

It is an arithmetic number, because the mean of its divisors is an integer number (609946116).

Almost surely, 2^1219892231 is an apocalyptic number.

1219892231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219892231 is an equidigital number, since it uses as much as digits as its factorization.

1219892231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 1219892231 is about 34926.9556503283. The cubic root of 1219892231 is about 1068.4982662769.

The spelling of 1219892231 in words is "one billion, two hundred nineteen million, eight hundred ninety-two thousand, two hundred thirty-one".