72322451 has 2 divisors, whose sum is σ = 72322452. Its totient is φ = 72322450.

The previous prime is 72322441. The next prime is 72322469. The reversal of 72322451 is 15422327.

It is a weak prime.

It is an emirp because it is prime and its reverse (15422327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72322451 - 2¹⁴ = 72306067 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72322451.

It is not a weakly prime, because it can be changed into another prime (72322421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36161225 + 36161226.

It is an arithmetic number, because the mean of its divisors is an integer number (36161226).

Almost surely, 2^72322451 is an apocalyptic number.

72322451 is a deficient number, since it is larger than the sum of its proper divisors (1).

72322451 is an equidigital number, since it uses as much as digits as its factorization.

72322451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 26.

The square root of 72322451 is about 8504.2607556448. The cubic root of 72322451 is about 416.6368815687.

Adding to 72322451 its reverse (15422327), we get a palindrome (87744778).

The spelling of 72322451 in words is "seventy-two million, three hundred twenty-two thousand, four hundred fifty-one".