72214291 has 2 divisors, whose sum is σ = 72214292. Its totient is φ = 72214290.

The previous prime is 72214237. The next prime is 72214327. The reversal of 72214291 is 19241227.

It is a strong prime.

It is an emirp because it is prime and its reverse (19241227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72214291 - 2²¹ = 70117139 is a prime.

It is not a weakly prime, because it can be changed into another prime (72214211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36107145 + 36107146.

It is an arithmetic number, because the mean of its divisors is an integer number (36107146).

Almost surely, 2^72214291 is an apocalyptic number.

72214291 is a deficient number, since it is larger than the sum of its proper divisors (1).

72214291 is an equidigital number, since it uses as much as digits as its factorization.

72214291 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 72214291 is about 8497.8992109815. The cubic root of 72214291 is about 416.4290810509.

The spelling of 72214291 in words is "seventy-two million, two hundred fourteen thousand, two hundred ninety-one".