135553531 has 2 divisors, whose sum is σ = 135553532. Its totient is φ = 135553530.

The previous prime is 135553507. The next prime is 135553547. The reversal of 135553531 is 135355531.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (135355531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135553531 - 2⁷ = 135553403 is a prime.

It is a super-2 number, since 2×135553531² = 36749519533135922, which contains 22 as substring.

It is equal to p_7675006 and since 135553531 and 7675006 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 135553493 and 135553502.

It is not a weakly prime, because it can be changed into another prime (135553591) 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, 67776765 + 67776766.

It is an arithmetic number, because the mean of its divisors is an integer number (67776766).

Almost surely, 2^135553531 is an apocalyptic number.

135553531 is a deficient number, since it is larger than the sum of its proper divisors (1).

135553531 is an equidigital number, since it uses as much as digits as its factorization.

135553531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16875, while the sum is 31.

The square root of 135553531 is about 11642.7458531053. The cubic root of 135553531 is about 513.6929573203.

The spelling of 135553531 in words is "one hundred thirty-five million, five hundred fifty-three thousand, five hundred thirty-one".