55981235 has 8 divisors (see below), whose sum is σ = 67228656. Its totient is φ = 44750880.

The previous prime is 55981229. The next prime is 55981253. The reversal of 55981235 is 53218955.

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

It is not a de Polignac number, because 55981235 - 2¹² = 55977139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4652 + ... + 11558.

It is an arithmetic number, because the mean of its divisors is an integer number (8403582).

Almost surely, 2^55981235 is an apocalyptic number.

55981235 is a deficient number, since it is larger than the sum of its proper divisors (11247421).

55981235 is a wasteful number, since it uses less digits than its factorization.

55981235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533.

The product of its digits is 54000, while the sum is 38.

The square root of 55981235 is about 7482.0608791963. The cubic root of 55981235 is about 382.5434982642.

The spelling of 55981235 in words is "fifty-five million, nine hundred eighty-one thousand, two hundred thirty-five".