61436221 has 16 divisors (see below), whose sum is σ = 76809600. Its totient is φ = 47738880.

The previous prime is 61436213. The next prime is 61436227. The reversal of 61436221 is 12263416.

It is not a de Polignac number, because 61436221 - 2³ = 61436213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61436227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33685 + ... + 35461.

It is an arithmetic number, because the mean of its divisors is an integer number (4800600).

Almost surely, 2^61436221 is an apocalyptic number.

It is an amenable number.

61436221 is a deficient number, since it is larger than the sum of its proper divisors (15373379).

61436221 is a wasteful number, since it uses less digits than its factorization.

61436221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its digits is 1728, while the sum is 25.

The square root of 61436221 is about 7838.1261153416. The cubic root of 61436221 is about 394.5858416094.

Adding to 61436221 its reverse (12263416), we get a palindrome (73699637).

The spelling of 61436221 in words is "sixty-one million, four hundred thirty-six thousand, two hundred twenty-one".