68461221 has 4 divisors (see below), whose sum is σ = 91281632. Its totient is φ = 45640812.

The previous prime is 68461219. The next prime is 68461231. The reversal of 68461221 is 12216486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68461221 - 2¹ = 68461219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68461231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11410201 + ... + 11410206.

It is an arithmetic number, because the mean of its divisors is an integer number (22820408).

Almost surely, 2^68461221 is an apocalyptic number.

It is an amenable number.

68461221 is a deficient number, since it is larger than the sum of its proper divisors (22820411).

68461221 is a wasteful number, since it uses less digits than its factorization.

68461221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22820410.

The product of its digits is 4608, while the sum is 30.

The square root of 68461221 is about 8274.1296218998. The cubic root of 68461221 is about 409.0862478347.

The spelling of 68461221 in words is "sixty-eight million, four hundred sixty-one thousand, two hundred twenty-one".