135621503033 has 2 divisors, whose sum is σ = 135621503034. Its totient is φ = 135621503032.

The previous prime is 135621503027. The next prime is 135621503111. The reversal of 135621503033 is 330305126531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132312607504 + 3308895529 = 363748^2 + 57523^2 .

It is a cyclic number.

It is not a de Polignac number, because 135621503033 - 2¹⁸ = 135621240889 is a prime.

It is not a weakly prime, because it can be changed into another prime (135621503833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67810751516 + 67810751517.

It is an arithmetic number, because the mean of its divisors is an integer number (67810751517).

Almost surely, 2^135621503033 is an apocalyptic number.

It is an amenable number.

135621503033 is a deficient number, since it is larger than the sum of its proper divisors (1).

135621503033 is an equidigital number, since it uses as much as digits as its factorization.

135621503033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 32.

Adding to 135621503033 its reverse (330305126531), we get a palindrome (465926629564).

The spelling of 135621503033 in words is "one hundred thirty-five billion, six hundred twenty-one million, five hundred three thousand, thirty-three".