55409901 has 8 divisors (see below), whose sum is σ = 75681984. Its totient is φ = 36038880.

The previous prime is 55409873. The next prime is 55409933. The reversal of 55409901 is 10990455.

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

It is not a de Polignac number, because 55409901 - 2⁵ = 55409869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55409941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225121 + ... + 225366.

It is an arithmetic number, because the mean of its divisors is an integer number (9460248).

Almost surely, 2^55409901 is an apocalyptic number.

It is an amenable number.

55409901 is a deficient number, since it is larger than the sum of its proper divisors (20272083).

55409901 is a wasteful number, since it uses less digits than its factorization.

55409901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450531.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 55409901 is about 7443.7827077367. The cubic root of 55409901 is about 381.2376566460.

The spelling of 55409901 in words is "fifty-five million, four hundred nine thousand, nine hundred one".