60221391 has 8 divisors (see below), whose sum is σ = 80582064. Its totient is φ = 40004160.

The previous prime is 60221389. The next prime is 60221401. The reversal of 60221391 is 19312206.

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

It is not a de Polignac number, because 60221391 - 2¹ = 60221389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60228391) 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, 34876 + ... + 36561.

It is an arithmetic number, because the mean of its divisors is an integer number (10072758).

Almost surely, 2^60221391 is an apocalyptic number.

60221391 is a deficient number, since it is larger than the sum of its proper divisors (20360673).

60221391 is a wasteful number, since it uses less digits than its factorization.

60221391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71721.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 60221391 is about 7760.2442616196. The cubic root of 60221391 is about 391.9676822413.

Adding to 60221391 its reverse (19312206), we get a palindrome (79533597).

The spelling of 60221391 in words is "sixty million, two hundred twenty-one thousand, three hundred ninety-one".