72221419 has 2 divisors, whose sum is σ = 72221420. Its totient is φ = 72221418.

The previous prime is 72221399. The next prime is 72221431. The reversal of 72221419 is 91412227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72221419 - 2²¹ = 70124267 is a prime.

It is a super-2 number, since 2×72221419² = 10431866724747122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72221119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110709 + 36110710.

It is an arithmetic number, because the mean of its divisors is an integer number (36110710).

Almost surely, 2^72221419 is an apocalyptic number.

72221419 is a deficient number, since it is larger than the sum of its proper divisors (1).

72221419 is an equidigital number, since it uses as much as digits as its factorization.

72221419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 72221419 is about 8498.3185984052. The cubic root of 72221419 is about 416.4427819809.

The spelling of 72221419 in words is "seventy-two million, two hundred twenty-one thousand, four hundred nineteen".