61421219 has 2 divisors, whose sum is σ = 61421220. Its totient is φ = 61421218.

The previous prime is 61421209. The next prime is 61421237. The reversal of 61421219 is 91212416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61421219 - 2²⁰ = 60372643 is a prime.

It is a super-2 number, since 2×61421219² = 7545132286891922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61421209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30710609 + 30710610.

It is an arithmetic number, because the mean of its divisors is an integer number (30710610).

Almost surely, 2^61421219 is an apocalyptic number.

61421219 is a deficient number, since it is larger than the sum of its proper divisors (1).

61421219 is an equidigital number, since it uses as much as digits as its factorization.

61421219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 61421219 is about 7837.1690679735. The cubic root of 61421219 is about 394.5537212598.

The spelling of 61421219 in words is "sixty-one million, four hundred twenty-one thousand, two hundred nineteen".