2442138731 has 2 divisors, whose sum is σ = 2442138732. Its totient is φ = 2442138730.

The previous prime is 2442138709. The next prime is 2442138733. The reversal of 2442138731 is 1378312442.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2442138731 - 2⁶ = 2442138667 is a prime.

It is a super-2 number, since 2×2442138731² = 11928083162900580722, which contains 22 as substring.

Together with 2442138733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2442138691 and 2442138700.

It is not a weakly prime, because it can be changed into another prime (2442138733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221069365 + 1221069366.

It is an arithmetic number, because the mean of its divisors is an integer number (1221069366).

Almost surely, 2^2442138731 is an apocalyptic number.

2442138731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2442138731 is an equidigital number, since it uses as much as digits as its factorization.

2442138731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 2442138731 is about 49418.0000708244. Note that the first 4 decimals coincide. The cubic root of 2442138731 is about 1346.6563308427.

The spelling of 2442138731 in words is "two billion, four hundred forty-two million, one hundred thirty-eight thousand, seven hundred thirty-one".