55425989 has 8 divisors (see below), whose sum is σ = 58030560. Its totient is φ = 52867696.

The previous prime is 55425977. The next prime is 55426009. The reversal of 55425989 is 98952455.

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

It is not a de Polignac number, because 55425989 - 2¹⁶ = 55360453 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 (55425919) 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, 9107 + ... + 13920.

It is an arithmetic number, because the mean of its divisors is an integer number (7253820).

Almost surely, 2^55425989 is an apocalyptic number.

It is an amenable number.

55425989 is a deficient number, since it is larger than the sum of its proper divisors (2604571).

55425989 is a wasteful number, since it uses less digits than its factorization.

55425989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23139.

The product of its digits is 648000, while the sum is 47.

The square root of 55425989 is about 7444.8632626798. The cubic root of 55425989 is about 381.2745499196.

The spelling of 55425989 in words is "fifty-five million, four hundred twenty-five thousand, nine hundred eighty-nine".