61163321 has 2 divisors, whose sum is σ = 61163322. Its totient is φ = 61163320.

The previous prime is 61163317. The next prime is 61163351. The reversal of 61163321 is 12336116.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 21724921 = 6280^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 61163321 - 2² = 61163317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61163351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30581660 + 30581661.

It is an arithmetic number, because the mean of its divisors is an integer number (30581661).

Almost surely, 2^61163321 is an apocalyptic number.

It is an amenable number.

61163321 is a deficient number, since it is larger than the sum of its proper divisors (1).

61163321 is an equidigital number, since it uses as much as digits as its factorization.

61163321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 61163321 is about 7820.6982424845. The cubic root of 61163321 is about 394.0007236281. Note that the first 3 decimals are identical.

Adding to 61163321 its reverse (12336116), we get a palindrome (73499437).

The spelling of 61163321 in words is "sixty-one million, one hundred sixty-three thousand, three hundred twenty-one".