55003231 has 2 divisors, whose sum is σ = 55003232. Its totient is φ = 55003230.

The previous prime is 55003217. The next prime is 55003261. The reversal of 55003231 is 13230055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55003231 - 2⁵ = 55003199 is a prime.

It is a super-2 number, since 2×55003231² = 6050710840878722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55003199 and 55003208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55003261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27501615 + 27501616.

It is an arithmetic number, because the mean of its divisors is an integer number (27501616).

Almost surely, 2^55003231 is an apocalyptic number.

55003231 is a deficient number, since it is larger than the sum of its proper divisors (1).

55003231 is an equidigital number, since it uses as much as digits as its factorization.

55003231 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 19.

The square root of 55003231 is about 7416.4163178721. The cubic root of 55003231 is about 380.3026928027.

Adding to 55003231 its reverse (13230055), we get a palindrome (68233286).

The spelling of 55003231 in words is "fifty-five million, three thousand, two hundred thirty-one".