988381000531 has 4 divisors (see below), whose sum is σ = 988409559064. Its totient is φ = 988352442000.

The previous prime is 988381000499. The next prime is 988381000571. The reversal of 988381000531 is 135000183889.

It is a semiprime because it is the product of two primes.

It is a 5-Lehmer number, since φ(988381000531) divides (988381000531-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 988381000531 - 2⁵ = 988381000499 is a prime.

It is a super-2 number, since 2×988381000531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988381000571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14227290 + ... + 14296591.

It is an arithmetic number, because the mean of its divisors is an integer number (247102389766).

Almost surely, 2^988381000531 is an apocalyptic number.

988381000531 is a deficient number, since it is larger than the sum of its proper divisors (28558533).

988381000531 is a wasteful number, since it uses less digits than its factorization.

988381000531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28558532.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 988381000531 in words is "nine hundred eighty-eight billion, three hundred eighty-one million, five hundred thirty-one", and thus it is an aban number.