135570251 has 2 divisors, whose sum is σ = 135570252. Its totient is φ = 135570250.

The previous prime is 135570217. The next prime is 135570269. The reversal of 135570251 is 152075531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135570251 - 2¹⁴ = 135553867 is a prime.

It is not a weakly prime, because it can be changed into another prime (135570751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67785125 + 67785126.

It is an arithmetic number, because the mean of its divisors is an integer number (67785126).

Almost surely, 2^135570251 is an apocalyptic number.

135570251 is a deficient number, since it is larger than the sum of its proper divisors (1).

135570251 is an equidigital number, since it uses as much as digits as its factorization.

135570251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 135570251 is about 11643.4638746380. The cubic root of 135570251 is about 513.7140771270.

The spelling of 135570251 in words is "one hundred thirty-five million, five hundred seventy thousand, two hundred fifty-one".