55513645 has 16 divisors (see below), whose sum is σ = 74365632. Its totient is φ = 39432960.

The previous prime is 55513643. The next prime is 55513657. The reversal of 55513645 is 54631555.

55513645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55513645 - 2¹ = 55513643 is a prime.

It is a super-3 number, since 3×55513645³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55513645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55513643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9372 + ... + 14101.

It is an arithmetic number, because the mean of its divisors is an integer number (4647852).

Almost surely, 2^55513645 is an apocalyptic number.

55513645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55513645 is a deficient number, since it is larger than the sum of its proper divisors (18851987).

55513645 is a wasteful number, since it uses less digits than its factorization.

55513645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23532.

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

The square root of 55513645 is about 7450.7479490317. The cubic root of 55513645 is about 381.4754388264.

The spelling of 55513645 in words is "fifty-five million, five hundred thirteen thousand, six hundred forty-five".