238536039431 has 2 divisors, whose sum is σ = 238536039432. Its totient is φ = 238536039430.

The previous prime is 238536039389. The next prime is 238536039479. The reversal of 238536039431 is 134930635832.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238536039431 - 2⁶ = 238536039367 is a prime.

It is a super-2 number, since 2×238536039431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238536032431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119268019715 + 119268019716.

It is an arithmetic number, because the mean of its divisors is an integer number (119268019716).

Almost surely, 2^238536039431 is an apocalyptic number.

238536039431 is a deficient number, since it is larger than the sum of its proper divisors (1).

238536039431 is an equidigital number, since it uses as much as digits as its factorization.

238536039431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 238536039431 in words is "two hundred thirty-eight billion, five hundred thirty-six million, thirty-nine thousand, four hundred thirty-one".