55136545 has 4 divisors (see below), whose sum is σ = 66163860. Its totient is φ = 44109232.

The previous prime is 55136539. The next prime is 55136561. The reversal of 55136545 is 54563155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14470416 + 40666129 = 3804^2 + 6377^2 .

It is a cyclic number.

It is not a de Polignac number, because 55136545 - 2¹⁷ = 55005473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55136545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5513650 + ... + 5513659.

It is an arithmetic number, because the mean of its divisors is an integer number (16540965).

Almost surely, 2^55136545 is an apocalyptic number.

It is an amenable number.

55136545 is a deficient number, since it is larger than the sum of its proper divisors (11027315).

55136545 is a wasteful number, since it uses less digits than its factorization.

55136545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027314.

The product of its digits is 45000, while the sum is 34.

The square root of 55136545 is about 7425.3986424972. The cubic root of 55136545 is about 380.6096975989.

The spelling of 55136545 in words is "fifty-five million, one hundred thirty-six thousand, five hundred forty-five".