55242393 has 16 divisors (see below), whose sum is σ = 75786816. Its totient is φ = 35778240.

The previous prime is 55242391. The next prime is 55242479. The reversal of 55242393 is 39324255.

It is not a de Polignac number, because 55242393 - 2¹ = 55242391 is a prime.

It is a super-3 number, since 3×55242393³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55242391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13371 + ... + 17007.

It is an arithmetic number, because the mean of its divisors is an integer number (4736676).

Almost surely, 2^55242393 is an apocalyptic number.

It is an amenable number.

55242393 is a deficient number, since it is larger than the sum of its proper divisors (20544423).

55242393 is a wasteful number, since it uses less digits than its factorization.

55242393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784.

The product of its digits is 32400, while the sum is 33.

The square root of 55242393 is about 7432.5226538504. The cubic root of 55242393 is about 380.8530995183.

The spelling of 55242393 in words is "fifty-five million, two hundred forty-two thousand, three hundred ninety-three".