135231501 has 4 divisors (see below), whose sum is σ = 180308672. Its totient is φ = 90154332.

The previous prime is 135231491. The next prime is 135231539. The reversal of 135231501 is 105132531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135231501 - 2⁵ = 135231469 is a prime.

It is a super-3 number, since 3×135231501³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135231541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22538581 + ... + 22538586.

It is an arithmetic number, because the mean of its divisors is an integer number (45077168).

Almost surely, 2^135231501 is an apocalyptic number.

It is an amenable number.

135231501 is a deficient number, since it is larger than the sum of its proper divisors (45077171).

135231501 is an equidigital number, since it uses as much as digits as its factorization.

135231501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45077170.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 135231501 is about 11628.9079882851. The cubic root of 135231501 is about 513.2858470251.

The spelling of 135231501 in words is "one hundred thirty-five million, two hundred thirty-one thousand, five hundred one".