38505257243 has 2 divisors, whose sum is σ = 38505257244. Its totient is φ = 38505257242.

The previous prime is 38505257233. The next prime is 38505257249. The reversal of 38505257243 is 34275250583.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38505257243 - 2⁶ = 38505257179 is a prime.

It is a super-2 number, since 2×38505257243² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38505257194 and 38505257203.

It is not a weakly prime, because it can be changed into another prime (38505257249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19252628621 + 19252628622.

It is an arithmetic number, because the mean of its divisors is an integer number (19252628622).

Almost surely, 2^38505257243 is an apocalyptic number.

38505257243 is a deficient number, since it is larger than the sum of its proper divisors (1).

38505257243 is an equidigital number, since it uses as much as digits as its factorization.

38505257243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 38505257243 in words is "thirty-eight billion, five hundred five million, two hundred fifty-seven thousand, two hundred forty-three".