135432251 has 4 divisors (see below), whose sum is σ = 143398872. Its totient is φ = 127465632.

The previous prime is 135432229. The next prime is 135432313. The reversal of 135432251 is 152234531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135432251 - 2¹⁰ = 135431227 is a prime.

It is a super-2 number, since 2×135432251² = 36683789221854002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135432251.

It is not an unprimeable number, because it can be changed into a prime (135432221) 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, 3983285 + ... + 3983318.

It is an arithmetic number, because the mean of its divisors is an integer number (35849718).

Almost surely, 2^135432251 is an apocalyptic number.

135432251 is a deficient number, since it is larger than the sum of its proper divisors (7966621).

135432251 is an equidigital number, since it uses as much as digits as its factorization.

135432251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7966620.

The product of its digits is 3600, while the sum is 26.

The square root of 135432251 is about 11637.5362942506. The cubic root of 135432251 is about 513.5397109218.

Adding to 135432251 its reverse (152234531), we get a palindrome (287666782).

The spelling of 135432251 in words is "one hundred thirty-five million, four hundred thirty-two thousand, two hundred fifty-one".