55112531 has 4 divisors (see below), whose sum is σ = 57508752. Its totient is φ = 52716312.

The previous prime is 55112507. The next prime is 55112537. The reversal of 55112531 is 13521155.

It is a happy number.

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 55112531 - 2⁶ = 55112467 is a prime.

It is a super-2 number, since 2×55112531² = 6074782146451922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 2396197 = 55112531 / (5 + 5 + 1 + 1 + 2 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55112497 and 55112506.

It is not an unprimeable number, because it can be changed into a prime (55112537) 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, 1198076 + ... + 1198121.

It is an arithmetic number, because the mean of its divisors is an integer number (14377188).

Almost surely, 2^55112531 is an apocalyptic number.

55112531 is a deficient number, since it is larger than the sum of its proper divisors (2396221).

55112531 is a wasteful number, since it uses less digits than its factorization.

55112531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396220.

The product of its digits is 750, while the sum is 23.

The square root of 55112531 is about 7423.7814488305. The cubic root of 55112531 is about 380.5544330520.

Adding to 55112531 its reverse (13521155), we get a palindrome (68633686).

The spelling of 55112531 in words is "fifty-five million, one hundred twelve thousand, five hundred thirty-one".