2231818949 has 2 divisors, whose sum is σ = 2231818950. Its totient is φ = 2231818948.

The previous prime is 2231818943. The next prime is 2231818957. The reversal of 2231818949 is 9498181322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1414888225 + 816930724 = 37615^2 + 28582^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231818949 - 2⁴ = 2231818933 is a prime.

It is a super-3 number, since 3×2231818949³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231818943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115909474 + 1115909475.

It is an arithmetic number, because the mean of its divisors is an integer number (1115909475).

Almost surely, 2^2231818949 is an apocalyptic number.

It is an amenable number.

2231818949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231818949 is an equidigital number, since it uses as much as digits as its factorization.

2231818949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 47.

The square root of 2231818949 is about 47242.1310802127. The cubic root of 2231818949 is about 1306.8316785033.

The spelling of 2231818949 in words is "two billion, two hundred thirty-one million, eight hundred eighteen thousand, nine hundred forty-nine".