55127531 has 8 divisors (see below), whose sum is σ = 58150800. Its totient is φ = 52116480.

The previous prime is 55127519. The next prime is 55127537. The reversal of 55127531 is 13572155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55127531 - 2¹⁸ = 54865387 is a prime.

It is a super-2 number, since 2×55127531² = 6078089348311922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55127494 and 55127503.

It is not an unprimeable number, because it can be changed into a prime (55127537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7115 + ... + 12683.

It is an arithmetic number, because the mean of its divisors is an integer number (7268850).

Almost surely, 2^55127531 is an apocalyptic number.

55127531 is a deficient number, since it is larger than the sum of its proper divisors (3023269).

55127531 is a wasteful number, since it uses less digits than its factorization.

55127531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109.

The product of its digits is 5250, while the sum is 29.

The square root of 55127531 is about 7424.7916469083. The cubic root of 55127531 is about 380.5889551385.

Adding to 55127531 its reverse (13572155), we get a palindrome (68699686).

It can be divided in two parts, 551 and 27531, that added together give a palindrome (28082).

The spelling of 55127531 in words is "fifty-five million, one hundred twenty-seven thousand, five hundred thirty-one".