60221681 has 8 divisors (see below), whose sum is σ = 66607464. Its totient is φ = 54086400.

The previous prime is 60221671. The next prime is 60221683. The reversal of 60221681 is 18612206.

It can be written as a sum of positive squares in 4 ways, for example, as 8151025 + 52070656 = 2855^2 + 7216^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60221681 is a prime.

It is a super-2 number, since 2×60221681² = 7253301724931522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 60221681.

It is not an unprimeable number, because it can be changed into a prime (60221683) 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, 62120 + ... + 63081.

It is an arithmetic number, because the mean of its divisors is an integer number (8325933).

Almost surely, 2^60221681 is an apocalyptic number.

It is an amenable number.

60221681 is a deficient number, since it is larger than the sum of its proper divisors (6385783).

60221681 is a wasteful number, since it uses less digits than its factorization.

60221681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125251.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 60221681 is about 7760.2629465760. The cubic root of 60221681 is about 391.9683114222.

Adding to 60221681 its reverse (18612206), we get a palindrome (78833887).

The spelling of 60221681 in words is "sixty million, two hundred twenty-one thousand, six hundred eighty-one".