61144219 has 2 divisors, whose sum is σ = 61144220. Its totient is φ = 61144218.

The previous prime is 61144217. The next prime is 61144229. The reversal of 61144219 is 91244116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61144219 - 2¹ = 61144217 is a prime.

It is a super-2 number, since 2×61144219² = 7477231034239922, which contains 22 as substring.

Together with 61144217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61144217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572109 + 30572110.

It is an arithmetic number, because the mean of its divisors is an integer number (30572110).

Almost surely, 2^61144219 is an apocalyptic number.

61144219 is a deficient number, since it is larger than the sum of its proper divisors (1).

61144219 is an equidigital number, since it uses as much as digits as its factorization.

61144219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 61144219 is about 7819.4769006629. The cubic root of 61144219 is about 393.9597023899.

The spelling of 61144219 in words is "sixty-one million, one hundred forty-four thousand, two hundred nineteen".