55275615 has 20 divisors (see below), whose sum is σ = 99087384. Its totient is φ = 29480112.

The previous prime is 55275613. The next prime is 55275637. The reversal of 55275615 is 51657255.

It is a happy number.

It is not a de Polignac number, because 55275615 - 2¹ = 55275613 is a prime.

It is a super-2 number, since 2×55275615² = 6110787227256450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55275615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55275613) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 67837 + ... + 68646.

Almost surely, 2^55275615 is an apocalyptic number.

55275615 is a deficient number, since it is larger than the sum of its proper divisors (43811769).

55275615 is a wasteful number, since it uses less digits than its factorization.

55275615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136500 (or 136491 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 55275615 is about 7434.7572253571. The cubic root of 55275615 is about 380.9294307888.

It can be divided in two parts, 552 and 75615, that added together give a palindrome (76167).

The spelling of 55275615 in words is "fifty-five million, two hundred seventy-five thousand, six hundred fifteen".