55273990 has 8 divisors (see below), whose sum is σ = 99493200. Its totient is φ = 22109592.

The previous prime is 55273979. The next prime is 55273993. The reversal of 55273990 is 9937255.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55273993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2763690 + ... + 2763709.

It is an arithmetic number, because the mean of its divisors is an integer number (12436650).

Almost surely, 2^55273990 is an apocalyptic number.

55273990 is a deficient number, since it is larger than the sum of its proper divisors (44219210).

55273990 is a wasteful number, since it uses less digits than its factorization.

55273990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527406.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 55273990 is about 7434.6479405551. The cubic root of 55273990 is about 380.9256978806.

The spelling of 55273990 in words is "fifty-five million, two hundred seventy-three thousand, nine hundred ninety".