135397804531 has 8 divisors (see below), whose sum is σ = 147932900784. Its totient is φ = 122900409120.

The previous prime is 135397804523. The next prime is 135397804543. The reversal of 135397804531 is 135408793531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135397804531 - 2³ = 135397804523 is a prime.

It is a super-2 number, since 2×135397804531² (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 (135397804511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9417696 + ... + 9432061.

It is an arithmetic number, because the mean of its divisors is an integer number (18491612598).

Almost surely, 2^135397804531 is an apocalyptic number.

135397804531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135397804531 is a deficient number, since it is larger than the sum of its proper divisors (12535096253).

135397804531 is a wasteful number, since it uses less digits than its factorization.

135397804531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18850421.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 135397804531 in words is "one hundred thirty-five billion, three hundred ninety-seven million, eight hundred four thousand, five hundred thirty-one".