988555231 has 2 divisors, whose sum is σ = 988555232. Its totient is φ = 988555230.

The previous prime is 988555201. The next prime is 988555261. The reversal of 988555231 is 132555889.

It is a balanced prime because it is at equal distance from previous prime (988555201) and next prime (988555261).

It is an emirp because it is prime and its reverse (132555889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 988555231 - 2¹¹ = 988553183 is a prime.

It is a super-2 number, since 2×988555231² = 1954482889474926722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988555201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494277615 + 494277616.

It is an arithmetic number, because the mean of its divisors is an integer number (494277616).

Almost surely, 2^988555231 is an apocalyptic number.

988555231 is a deficient number, since it is larger than the sum of its proper divisors (1).

988555231 is an equidigital number, since it uses as much as digits as its factorization.

988555231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 46.

The square root of 988555231 is about 31441.2981761250. The cubic root of 988555231 is about 996.1704301155.

The spelling of 988555231 in words is "nine hundred eighty-eight million, five hundred fifty-five thousand, two hundred thirty-one".