55600031 has 2 divisors, whose sum is σ = 55600032. Its totient is φ = 55600030.

The previous prime is 55600009. The next prime is 55600033. The reversal of 55600031 is 13000655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55600031 - 2⁶ = 55599967 is a prime.

It is a super-2 number, since 2×55600031² = 6182726894401922, which contains 22 as substring.

Together with 55600033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55599976 and 55600012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55600033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27800015 + 27800016.

It is an arithmetic number, because the mean of its divisors is an integer number (27800016).

Almost surely, 2^55600031 is an apocalyptic number.

55600031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55600031 is an equidigital number, since it uses as much as digits as its factorization.

55600031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 55600031 is about 7456.5428316345. The cubic root of 55600031 is about 381.6732103741.

Adding to 55600031 its reverse (13000655), we get a palindrome (68600686).

The spelling of 55600031 in words is "fifty-five million, six hundred thousand, thirty-one".