72223651 has 2 divisors, whose sum is σ = 72223652. Its totient is φ = 72223650.

The previous prime is 72223639. The next prime is 72223661. The reversal of 72223651 is 15632227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72223651 - 2¹³ = 72215459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72223661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36111825 + 36111826.

It is an arithmetic number, because the mean of its divisors is an integer number (36111826).

Almost surely, 2^72223651 is an apocalyptic number.

72223651 is a deficient number, since it is larger than the sum of its proper divisors (1).

72223651 is an equidigital number, since it uses as much as digits as its factorization.

72223651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 72223651 is about 8498.4499174850. The cubic root of 72223651 is about 416.4470719857.

Adding to 72223651 its reverse (15632227), we get a palindrome (87855878).

The spelling of 72223651 in words is "seventy-two million, two hundred twenty-three thousand, six hundred fifty-one".