134550401521 has 4 divisors (see below), whose sum is σ = 135453424500. Its totient is φ = 133647378544.

The previous prime is 134550401519. The next prime is 134550401537. The reversal of 134550401521 is 125104055431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125104055431 = 607 ⋅206102233.

It can be written as a sum of positive squares in 2 ways, for example, as 31519031296 + 103031370225 = 177536^2 + 320985^2 .

It is a cyclic number.

It is not a de Polignac number, because 134550401521 - 2¹ = 134550401519 is a prime.

It is a super-2 number, since 2×134550401521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134550401591) 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, 451511266 + ... + 451511563.

It is an arithmetic number, because the mean of its divisors is an integer number (33863356125).

Almost surely, 2^134550401521 is an apocalyptic number.

It is an amenable number.

134550401521 is a deficient number, since it is larger than the sum of its proper divisors (903022979).

134550401521 is an equidigital number, since it uses as much as digits as its factorization.

134550401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903022978.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 134550401521 its reverse (125104055431), we get a palindrome (259654456952).

The spelling of 134550401521 in words is "one hundred thirty-four billion, five hundred fifty million, four hundred one thousand, five hundred twenty-one".