138052531 has 2 divisors, whose sum is σ = 138052532. Its totient is φ = 138052530.

The previous prime is 138052477. The next prime is 138052553. The reversal of 138052531 is 135250831.

It is a strong prime.

It is an emirp because it is prime and its reverse (135250831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138052531 - 2¹³ = 138044339 is a prime.

It is a super-2 number, since 2×138052531² = 38117002631011922, which contains 22 as substring.

It is equal to p_7808302 and since 138052531 and 7808302 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138052531.

It is not a weakly prime, because it can be changed into another prime (138052591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69026265 + 69026266.

It is an arithmetic number, because the mean of its divisors is an integer number (69026266).

Almost surely, 2^138052531 is an apocalyptic number.

138052531 is a deficient number, since it is larger than the sum of its proper divisors (1).

138052531 is an equidigital number, since it uses as much as digits as its factorization.

138052531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 138052531 is about 11749.5757795760. The cubic root of 138052531 is about 516.8304873971.

The spelling of 138052531 in words is "one hundred thirty-eight million, fifty-two thousand, five hundred thirty-one".