55239285 has 32 divisors (see below), whose sum is σ = 90243072. Its totient is φ = 28848960.

The previous prime is 55239271. The next prime is 55239293. The reversal of 55239285 is 58293255.

It is not a de Polignac number, because 55239285 - 2⁵ = 55239253 is a prime.

It is a super-2 number, since 2×55239285² = 6102757214622450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203700 + ... + 203970.

It is an arithmetic number, because the mean of its divisors is an integer number (2820096).

Almost surely, 2^55239285 is an apocalyptic number.

It is an amenable number.

55239285 is a deficient number, since it is larger than the sum of its proper divisors (35003787).

55239285 is a wasteful number, since it uses less digits than its factorization.

55239285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513.

The product of its digits is 108000, while the sum is 39.

The square root of 55239285 is about 7432.3135698112. The cubic root of 55239285 is about 380.8459569745.

The spelling of 55239285 in words is "fifty-five million, two hundred thirty-nine thousand, two hundred eighty-five".