55510331 has 2 divisors, whose sum is σ = 55510332. Its totient is φ = 55510330.

The previous prime is 55510313. The next prime is 55510349. The reversal of 55510331 is 13301555.

Together with previous prime (55510313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (55510313) and next prime (55510349).

It is a cyclic number.

It is not a de Polignac number, because 55510331 - 2¹⁴ = 55493947 is a prime.

It is a super-2 number, since 2×55510331² = 6162793695459122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55510297 and 55510306.

It is not a weakly prime, because it can be changed into another prime (55510361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27755165 + 27755166.

It is an arithmetic number, because the mean of its divisors is an integer number (27755166).

Almost surely, 2^55510331 is an apocalyptic number.

55510331 is a deficient number, since it is larger than the sum of its proper divisors (1).

55510331 is an equidigital number, since it uses as much as digits as its factorization.

55510331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 55510331 is about 7450.5255519326. The cubic root of 55510331 is about 381.4678476912.

Adding to 55510331 its reverse (13301555), we get a palindrome (68811886).

The spelling of 55510331 in words is "fifty-five million, five hundred ten thousand, three hundred thirty-one".