1375556531 has 2 divisors, whose sum is σ = 1375556532. Its totient is φ = 1375556530.

The previous prime is 1375556491. The next prime is 1375556563. The reversal of 1375556531 is 1356555731.

It is a strong prime.

It is an emirp because it is prime and its reverse (1356555731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375556531 - 2¹⁰ = 1375555507 is a prime.

It is a super-2 number, since 2×1375556531² = 3784311539953507922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1375556731) 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, 687778265 + 687778266.

It is an arithmetic number, because the mean of its divisors is an integer number (687778266).

Almost surely, 2^1375556531 is an apocalyptic number.

1375556531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375556531 is an equidigital number, since it uses as much as digits as its factorization.

1375556531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236250, while the sum is 41.

The square root of 1375556531 is about 37088.4959387679. The cubic root of 1375556531 is about 1112.1400509711.

The spelling of 1375556531 in words is "one billion, three hundred seventy-five million, five hundred fifty-six thousand, five hundred thirty-one".