135533251 has 16 divisors (see below), whose sum is σ = 163987200. Its totient is φ = 109423008.

The previous prime is 135533191. The next prime is 135533263. The reversal of 135533251 is 152335531.

It is a cyclic number.

It is not a de Polignac number, because 135533251 - 2²³ = 127144643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135533051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20961 + ... + 26653.

It is an arithmetic number, because the mean of its divisors is an integer number (10249200).

Almost surely, 2^135533251 is an apocalyptic number.

135533251 is a deficient number, since it is larger than the sum of its proper divisors (28453949).

135533251 is a wasteful number, since it uses less digits than its factorization.

135533251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898.

The product of its digits is 6750, while the sum is 28.

The square root of 135533251 is about 11641.8748919579. The cubic root of 135533251 is about 513.6673383817.

Adding to 135533251 its reverse (152335531), we get a palindrome (287868782).

The spelling of 135533251 in words is "one hundred thirty-five million, five hundred thirty-three thousand, two hundred fifty-one".