5321981 has 8 divisors (see below), whose sum is σ = 6224064. Its totient is φ = 4455360.

The previous prime is 5321963. The next prime is 5321983. The reversal of 5321981 is 1891235.

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

It is not a de Polignac number, because 5321981 - 2¹⁰ = 5320957 is a prime.

It is a super-2 number, since 2×5321981² = 56646963528722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5321983) 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, 8540 + ... + 9141.

It is an arithmetic number, because the mean of its divisors is an integer number (778008).

Almost surely, 2^5321981 is an apocalyptic number.

It is an amenable number.

5321981 is a deficient number, since it is larger than the sum of its proper divisors (902083).

5321981 is a wasteful number, since it uses less digits than its factorization.

5321981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17731.

The product of its digits is 2160, while the sum is 29.

The square root of 5321981 is about 2306.9419151769. The cubic root of 5321981 is about 174.5920401797.

The spelling of 5321981 in words is "five million, three hundred twenty-one thousand, nine hundred eighty-one".