135564471 has 12 divisors (see below), whose sum is σ = 223789072. Its totient is φ = 77465376.

The previous prime is 135564463. The next prime is 135564479. The reversal of 135564471 is 174465531.

135564471 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 644 + 7 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (135564463) and next prime (135564479).

It is not a de Polignac number, because 135564471 - 2³ = 135564463 is a prime.

It is a super-3 number, since 3×135564471³ (a number of 25 digits) contains 333 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 (135564479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1075846 + ... + 1075971.

Almost surely, 2^135564471 is an apocalyptic number.

135564471 is a deficient number, since it is larger than the sum of its proper divisors (88224601).

135564471 is a wasteful number, since it uses less digits than its factorization.

135564471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151830 (or 2151827 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 135564471 is about 11643.2156640681. The cubic root of 135564471 is about 513.7067763376.

The spelling of 135564471 in words is "one hundred thirty-five million, five hundred sixty-four thousand, four hundred seventy-one".