988951221 has 32 divisors (see below), whose sum is σ = 1513365120. Its totient is φ = 637932672.

The previous prime is 988951211. The next prime is 988951237. The reversal of 988951221 is 122159889.

It is not a de Polignac number, because 988951221 - 2²¹ = 986854069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988951211) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99730 + ... + 109196.

It is an arithmetic number, because the mean of its divisors is an integer number (47292660).

Almost surely, 2^988951221 is an apocalyptic number.

It is an amenable number.

988951221 is a deficient number, since it is larger than the sum of its proper divisors (524413899).

988951221 is a wasteful number, since it uses less digits than its factorization.

988951221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9602 (or 9596 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 988951221 is about 31447.5948364895. The cubic root of 988951221 is about 996.3034258437.

The spelling of 988951221 in words is "nine hundred eighty-eight million, nine hundred fifty-one thousand, two hundred twenty-one".