55351938 has 16 divisors (see below), whose sum is σ = 115517376. Its totient is φ = 17648400.

The previous prime is 55351931. The next prime is 55351943. The reversal of 55351938 is 83915355.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55351896 and 55351905.

It is not an unprimeable number, because it can be changed into a prime (55351931) 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, 200413 + ... + 200688.

It is an arithmetic number, because the mean of its divisors is an integer number (7219836).

Almost surely, 2^55351938 is an apocalyptic number.

55351938 is an abundant number, since it is smaller than the sum of its proper divisors (60165438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55351938 is a wasteful number, since it uses less digits than its factorization.

55351938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401129.

The product of its digits is 81000, while the sum is 39.

The square root of 55351938 is about 7439.8883056132. Note that the first 3 decimals coincide. The cubic root of 55351938 is about 381.1046756705.

The spelling of 55351938 in words is "fifty-five million, three hundred fifty-one thousand, nine hundred thirty-eight".