55250389 has 4 divisors (see below), whose sum is σ = 55370700. Its totient is φ = 55130080.

The previous prime is 55250383. The next prime is 55250441. The reversal of 55250389 is 98305255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98305255 = 5 ⋅19661051.

It can be written as a sum of positive squares in 2 ways, for example, as 17918289 + 37332100 = 4233^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 55250389 - 2⁹ = 55249877 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 (55250383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59464 + ... + 60385.

It is an arithmetic number, because the mean of its divisors is an integer number (13842675).

Almost surely, 2^55250389 is an apocalyptic number.

It is an amenable number.

55250389 is a deficient number, since it is larger than the sum of its proper divisors (120311).

55250389 is a wasteful number, since it uses less digits than its factorization.

55250389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120310.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 55250389 is about 7433.0605405849. The cubic root of 55250389 is about 380.8714740208.

The spelling of 55250389 in words is "fifty-five million, two hundred fifty thousand, three hundred eighty-nine".