55145623 has 8 divisors (see below), whose sum is σ = 60274928. Its totient is φ = 50143104.

The previous prime is 55145591. The next prime is 55145627. The reversal of 55145623 is 32654155.

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

It is a cyclic number.

It is not a de Polignac number, because 55145623 - 2⁵ = 55145591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145627) 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, 30786 + ... + 32527.

It is an arithmetic number, because the mean of its divisors is an integer number (7534366).

Almost surely, 2^55145623 is an apocalyptic number.

55145623 is a deficient number, since it is larger than the sum of its proper divisors (5129305).

55145623 is a wasteful number, since it uses less digits than its factorization.

55145623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63393.

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

The square root of 55145623 is about 7426.0098976503. The cubic root of 55145623 is about 380.6305850473.

Adding to 55145623 its reverse (32654155), we get a palindrome (87799778).

The spelling of 55145623 in words is "fifty-five million, one hundred forty-five thousand, six hundred twenty-three".