55140529 has 4 divisors (see below), whose sum is σ = 55177200.
Its totient is φ = 55103860.
The previous prime is 55140493. The next prime is 55140539. The reversal of 55140529 is 92504155.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 55140529 - 29 = 55140017 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 55140529.
It is not an unprimeable number, because it can be changed into a prime (55140539) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15979 + ... + 19120.
It is an arithmetic number, because the mean of its divisors is an integer number (13794300).
Almost surely, 255140529 is an apocalyptic number.
It is an amenable number.
55140529 is a deficient number, since it is larger than the sum of its proper divisors (36671).
55140529 is a wasteful number, since it uses less digits than its factorization.
55140529 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 36670.
The product of its (nonzero) digits is 9000, while the sum is 31.
The square root of 55140529 is about 7425.6669060765.
Note that the first 3 decimals coincide.
The cubic root of 55140529 is about 380.6188646133.
The spelling of 55140529 in words is "fifty-five million, one hundred forty thousand, five hundred twenty-nine".