135541234521431 has 4 divisors (see below), whose sum is σ = 137763221972664. Its totient is φ = 133319247070200.

The previous prime is 135541234521401. The next prime is 135541234521457. The reversal of 135541234521431 is 134125432145531.

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 135541234521431 - 2⁶ = 135541234521367 is a prime.

It is a super-2 number, since 2×135541234521431² (a number of 29 digits) contains 22 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 (135541234521401) 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, 1110993725525 + ... + 1110993725646.

It is an arithmetic number, because the mean of its divisors is an integer number (34440805493166).

Almost surely, 2^{135541234521431} is an apocalyptic number.

135541234521431 is a deficient number, since it is larger than the sum of its proper divisors (2221987451233).

135541234521431 is an equidigital number, since it uses as much as digits as its factorization.

135541234521431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221987451232.

The product of its digits is 864000, while the sum is 44.

Adding to 135541234521431 its reverse (134125432145531), we get a palindrome (269666666666962).

The spelling of 135541234521431 in words is "one hundred thirty-five trillion, five hundred forty-one billion, two hundred thirty-four million, five hundred twenty-one thousand, four hundred thirty-one".