55238493 has 8 divisors (see below), whose sum is σ = 74411008. Its totient is φ = 36445824.

The previous prime is 55238467. The next prime is 55238501. The reversal of 55238493 is 39483255.

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

It is not a de Polignac number, because 55238493 - 2⁸ = 55238237 is a prime.

It is a super-2 number, since 2×55238493² = 6102582217822098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55230493) 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, 94621 + ... + 95202.

It is an arithmetic number, because the mean of its divisors is an integer number (9301376).

Almost surely, 2^55238493 is an apocalyptic number.

It is an amenable number.

55238493 is a deficient number, since it is larger than the sum of its proper divisors (19172515).

55238493 is a wasteful number, since it uses less digits than its factorization.

55238493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189923.

The product of its digits is 129600, while the sum is 39.

The square root of 55238493 is about 7432.2602887681. The cubic root of 55238493 is about 380.8441368240.

The spelling of 55238493 in words is "fifty-five million, two hundred thirty-eight thousand, four hundred ninety-three".