72288553 has 2 divisors, whose sum is σ = 72288554. Its totient is φ = 72288552.

The previous prime is 72288533. The next prime is 72288577. The reversal of 72288553 is 35588227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48052624 + 24235929 = 6932^2 + 4923^2 .

It is an emirp because it is prime and its reverse (35588227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72288553 - 2¹³ = 72280361 is a prime.

It is not a weakly prime, because it can be changed into another prime (72288533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36144276 + 36144277.

It is an arithmetic number, because the mean of its divisors is an integer number (36144277).

Almost surely, 2^72288553 is an apocalyptic number.

It is an amenable number.

72288553 is a deficient number, since it is larger than the sum of its proper divisors (1).

72288553 is an equidigital number, since it uses as much as digits as its factorization.

72288553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 40.

The square root of 72288553 is about 8502.2675210793. The cubic root of 72288553 is about 416.5717779301.

The spelling of 72288553 in words is "seventy-two million, two hundred eighty-eight thousand, five hundred fifty-three".