981522001 has 8 divisors (see below), whose sum is σ = 1014690600. Its totient is φ = 948792960.

The previous prime is 981521971. The next prime is 981522019. The reversal of 981522001 is 100225189.

It can be written as a sum of positive squares in 4 ways, for example, as 9579025 + 971942976 = 3095^2 + 31176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981522001 - 2¹¹ = 981519953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981522071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105346 + ... + 114283.

It is an arithmetic number, because the mean of its divisors is an integer number (126836325).

Almost surely, 2^981522001 is an apocalyptic number.

It is an amenable number.

981522001 is a deficient number, since it is larger than the sum of its proper divisors (33168599).

981522001 is a wasteful number, since it uses less digits than its factorization.

981522001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219779.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 981522001 is about 31329.2515231373. The cubic root of 981522001 is about 993.8023353053.

The spelling of 981522001 in words is "nine hundred eighty-one million, five hundred twenty-two thousand, one".