55401189 has 4 divisors (see below), whose sum is σ = 73868256. Its totient is φ = 36934124.

The previous prime is 55401187. The next prime is 55401197. The reversal of 55401189 is 98110455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55401189 - 2¹ = 55401187 is a prime.

It is a super-3 number, since 3×55401189³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55401187) 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, 9233529 + ... + 9233534.

It is an arithmetic number, because the mean of its divisors is an integer number (18467064).

Almost surely, 2^55401189 is an apocalyptic number.

It is an amenable number.

55401189 is a deficient number, since it is larger than the sum of its proper divisors (18467067).

55401189 is a wasteful number, since it uses less digits than its factorization.

55401189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18467066.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 55401189 is about 7443.1974983874. The cubic root of 55401189 is about 381.2176751596.

The spelling of 55401189 in words is "fifty-five million, four hundred one thousand, one hundred eighty-nine".