55637121 has 8 divisors (see below), whose sum is σ = 75582720. Its totient is φ = 36391472.

The previous prime is 55637119. The next prime is 55637147. The reversal of 55637121 is 12173655.

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 55637121 - 2¹ = 55637119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55637521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174801 + ... + 175118.

It is an arithmetic number, because the mean of its divisors is an integer number (9447840).

Almost surely, 2^55637121 is an apocalyptic number.

It is an amenable number.

55637121 is a deficient number, since it is larger than the sum of its proper divisors (19945599).

55637121 is a wasteful number, since it uses less digits than its factorization.

55637121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349975.

The product of its digits is 6300, while the sum is 30.

The square root of 55637121 is about 7459.0294945120. The cubic root of 55637121 is about 381.7580611225.

The spelling of 55637121 in words is "fifty-five million, six hundred thirty-seven thousand, one hundred twenty-one".