135453420131231 has 4 divisors (see below), whose sum is σ = 135454869063864. Its totient is φ = 135451971198600.

The previous prime is 135453420131219. The next prime is 135453420131287. The reversal of 135453420131231 is 132131024354531.

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 135453420131231 - 2⁶ = 135453420131167 is a prime.

It is a super-2 number, since 2×135453420131231² (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 (135453420131131) 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, 724326080 + ... + 724513061.

It is an arithmetic number, because the mean of its divisors is an integer number (33863717265966).

Almost surely, 2^{135453420131231} is an apocalyptic number.

135453420131231 is a deficient number, since it is larger than the sum of its proper divisors (1448932633).

135453420131231 is an equidigital number, since it uses as much as digits as its factorization.

135453420131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448932632.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 135453420131231 its reverse (132131024354531), we get a palindrome (267584444485762).

The spelling of 135453420131231 in words is "one hundred thirty-five trillion, four hundred fifty-three billion, four hundred twenty million, one hundred thirty-one thousand, two hundred thirty-one".