61411221 has 6 divisors (see below), whose sum is σ = 88705110. Its totient is φ = 40940808.

The previous prime is 61411213. The next prime is 61411223. The reversal of 61411221 is 12211416.

It can be written as a sum of positive squares in only one way, i.e., 49196196 + 12215025 = 7014^2 + 3495^2 .

It is not a de Polignac number, because 61411221 - 2³ = 61411213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61411194 and 61411203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61411223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3411726 + ... + 3411743.

It is an arithmetic number, because the mean of its divisors is an integer number (14784185).

Almost surely, 2^61411221 is an apocalyptic number.

It is an amenable number.

61411221 is a deficient number, since it is larger than the sum of its proper divisors (27293889).

61411221 is a wasteful number, since it uses less digits than its factorization.

61411221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6823475 (or 6823472 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 61411221 is about 7836.5311841401. The cubic root of 61411221 is about 394.5323119259.

Adding to 61411221 its reverse (12211416), we get a palindrome (73622637).

The spelling of 61411221 in words is "sixty-one million, four hundred eleven thousand, two hundred twenty-one".