135551501 has 2 divisors, whose sum is σ = 135551502. Its totient is φ = 135551500.

The previous prime is 135551483. The next prime is 135551503. The reversal of 135551501 is 105155531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133518025 + 2033476 = 11555^2 + 1426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135551501 is a prime.

Together with 135551503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135551503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67775750 + 67775751.

It is an arithmetic number, because the mean of its divisors is an integer number (67775751).

Almost surely, 2^135551501 is an apocalyptic number.

It is an amenable number.

135551501 is a deficient number, since it is larger than the sum of its proper divisors (1).

135551501 is an equidigital number, since it uses as much as digits as its factorization.

135551501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1875, while the sum is 26.

The square root of 135551501 is about 11642.6586740315. The cubic root of 135551501 is about 513.6903930150.

The spelling of 135551501 in words is "one hundred thirty-five million, five hundred fifty-one thousand, five hundred one".