981220513 has 8 divisors (see below), whose sum is σ = 1207656128. Its totient is φ = 776350224.

The previous prime is 981220511. The next prime is 981220517. The reversal of 981220513 is 315022189.

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

It is not a de Polignac number, because 981220513 - 2¹ = 981220511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981220511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5391231 + ... + 5391412.

It is an arithmetic number, because the mean of its divisors is an integer number (150957016).

Almost surely, 2^981220513 is an apocalyptic number.

It is an amenable number.

981220513 is a deficient number, since it is larger than the sum of its proper divisors (226435615).

981220513 is a wasteful number, since it uses less digits than its factorization.

981220513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10782663.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 981220513 is about 31324.4395480590. The cubic root of 981220513 is about 993.7005715272.

The spelling of 981220513 in words is "nine hundred eighty-one million, two hundred twenty thousand, five hundred thirteen".