55206031 has 4 divisors (see below), whose sum is σ = 55962352. Its totient is φ = 54449712.

The previous prime is 55206013. The next prime is 55206079. The reversal of 55206031 is 13060255.

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 55206031 - 2⁵ = 55205999 is a prime.

It is a super-2 number, since 2×55206031² = 6095411717545922, 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 = 55205993 and 55206011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55206631) 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, 378051 + ... + 378196.

It is an arithmetic number, because the mean of its divisors is an integer number (13990588).

Almost surely, 2^55206031 is an apocalyptic number.

55206031 is a deficient number, since it is larger than the sum of its proper divisors (756321).

55206031 is an equidigital number, since it uses as much as digits as its factorization.

55206031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756320.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 55206031 is about 7430.0761099736. The cubic root of 55206031 is about 380.7695186591.

Adding to 55206031 its reverse (13060255), we get a palindrome (68266286).

The spelling of 55206031 in words is "fifty-five million, two hundred six thousand, thirty-one".