55623145 has 8 divisors (see below), whose sum is σ = 68901120. Its totient is φ = 43062960.

The previous prime is 55623109. The next prime is 55623149. The reversal of 55623145 is 54132655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55623145 - 2¹⁵ = 55590377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (55623149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179275 + ... + 179584.

It is an arithmetic number, because the mean of its divisors is an integer number (8612640).

Almost surely, 2^55623145 is an apocalyptic number.

It is an amenable number.

55623145 is a deficient number, since it is larger than the sum of its proper divisors (13277975).

55623145 is a wasteful number, since it uses less digits than its factorization.

55623145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358895.

The product of its digits is 18000, while the sum is 31.

The square root of 55623145 is about 7458.0925845688. The cubic root of 55623145 is about 381.7260926730.

The spelling of 55623145 in words is "fifty-five million, six hundred twenty-three thousand, one hundred forty-five".