52139332381 has 2 divisors, whose sum is σ = 52139332382. Its totient is φ = 52139332380.

The previous prime is 52139332327. The next prime is 52139332393. The reversal of 52139332381 is 18323393125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48739392900 + 3399939481 = 220770^2 + 58309^2 .

It is a cyclic number.

It is not a de Polignac number, because 52139332381 - 2¹¹ = 52139330333 is a prime.

It is a super-2 number, since 2×52139332381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52139332321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26069666190 + 26069666191.

It is an arithmetic number, because the mean of its divisors is an integer number (26069666191).

Almost surely, 2^52139332381 is an apocalyptic number.

It is an amenable number.

52139332381 is a deficient number, since it is larger than the sum of its proper divisors (1).

52139332381 is an equidigital number, since it uses as much as digits as its factorization.

52139332381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The spelling of 52139332381 in words is "fifty-two billion, one hundred thirty-nine million, three hundred thirty-two thousand, three hundred eighty-one".