55991335 has 8 divisors (see below), whose sum is σ = 68619456. Its totient is φ = 43839840.

The previous prime is 55991333. The next prime is 55991339. The reversal of 55991335 is 53319955.

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

It is not a de Polignac number, because 55991335 - 2¹ = 55991333 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 (55991333) 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, 118896 + ... + 119365.

It is an arithmetic number, because the mean of its divisors is an integer number (8577432).

Almost surely, 2^55991335 is an apocalyptic number.

55991335 is a deficient number, since it is larger than the sum of its proper divisors (12628121).

55991335 is a wasteful number, since it uses less digits than its factorization.

55991335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238313.

The product of its digits is 91125, while the sum is 40.

The square root of 55991335 is about 7482.7357964851. The cubic root of 55991335 is about 382.5665027406.

The spelling of 55991335 in words is "fifty-five million, nine hundred ninety-one thousand, three hundred thirty-five".