55545131 has 4 divisors (see below), whose sum is σ = 55614600. Its totient is φ = 55475664.

The previous prime is 55545109. The next prime is 55545157. The reversal of 55545131 is 13154555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55545131 - 2⁶ = 55545067 is a prime.

It is a super-2 number, since 2×55545131² = 6170523155614322, 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 = 55545094 and 55545103.

It is not an unprimeable number, because it can be changed into a prime (55545031) 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, 33521 + ... + 35138.

It is an arithmetic number, because the mean of its divisors is an integer number (13903650).

Almost surely, 2^55545131 is an apocalyptic number.

55545131 is a deficient number, since it is larger than the sum of its proper divisors (69469).

55545131 is an equidigital number, since it uses as much as digits as its factorization.

55545131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69468.

The product of its digits is 7500, while the sum is 29.

The square root of 55545131 is about 7452.8605917460. The cubic root of 55545131 is about 381.5475464171.

Adding to 55545131 its reverse (13154555), we get a palindrome (68699686).

The spelling of 55545131 in words is "fifty-five million, five hundred forty-five thousand, one hundred thirty-one".