135156551 has 4 divisors (see below), whose sum is σ = 137447400. Its totient is φ = 132865704.

The previous prime is 135156547. The next prime is 135156583. The reversal of 135156551 is 155651531.

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 135156551 - 2² = 135156547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135156521) 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, 1145336 + ... + 1145453.

It is an arithmetic number, because the mean of its divisors is an integer number (34361850).

Almost surely, 2^135156551 is an apocalyptic number.

135156551 is a deficient number, since it is larger than the sum of its proper divisors (2290849).

135156551 is an equidigital number, since it uses as much as digits as its factorization.

135156551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290848.

The product of its digits is 11250, while the sum is 32.

The square root of 135156551 is about 11625.6849690674. The cubic root of 135156551 is about 513.1910025462.

The spelling of 135156551 in words is "one hundred thirty-five million, one hundred fifty-six thousand, five hundred fifty-one".