135521422515 has 32 divisors (see below), whose sum is σ = 240984253440. Its totient is φ = 72260908128.

The previous prime is 135521422507. The next prime is 135521422523. The reversal of 135521422515 is 515224125531.

135521422515 is a `hidden beast` number, since 13 + 552 + 1 + 42 + 2 + 51 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (135521422507) and next prime (135521422523).

It is not a de Polignac number, because 135521422515 - 2³ = 135521422507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135521422515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461014 + ... + 695396.

It is an arithmetic number, because the mean of its divisors is an integer number (7530757920).

Almost surely, 2^135521422515 is an apocalyptic number.

135521422515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135521422515 is a deficient number, since it is larger than the sum of its proper divisors (105462830925).

135521422515 is a wasteful number, since it uses less digits than its factorization.

135521422515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238680 (or 238674 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The spelling of 135521422515 in words is "one hundred thirty-five billion, five hundred twenty-one million, four hundred twenty-two thousand, five hundred fifteen".