2239516381 has 2 divisors, whose sum is σ = 2239516382. Its totient is φ = 2239516380.

The previous prime is 2239516373. The next prime is 2239516451. The reversal of 2239516381 is 1836159322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1930811481 + 308704900 = 43941^2 + 17570^2 .

It is a cyclic number.

It is not a de Polignac number, because 2239516381 - 2³ = 2239516373 is a prime.

It is a super-2 number, since 2×2239516381² = 10030867241534674322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2239516781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119758190 + 1119758191.

It is an arithmetic number, because the mean of its divisors is an integer number (1119758191).

Almost surely, 2^2239516381 is an apocalyptic number.

It is an amenable number.

2239516381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2239516381 is an equidigital number, since it uses as much as digits as its factorization.

2239516381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 2239516381 is about 47323.5288308047. The cubic root of 2239516381 is about 1308.3323536183.

The spelling of 2239516381 in words is "two billion, two hundred thirty-nine million, five hundred sixteen thousand, three hundred eighty-one".