72552553 has 2 divisors, whose sum is σ = 72552554. Its totient is φ = 72552552.

The previous prime is 72552551. The next prime is 72552569. The reversal of 72552553 is 35525527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54937744 + 17614809 = 7412^2 + 4197^2 .

It is a cyclic number.

It is not a de Polignac number, because 72552553 - 2¹ = 72552551 is a prime.

Together with 72552551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72552551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36276276 + 36276277.

It is an arithmetic number, because the mean of its divisors is an integer number (36276277).

Almost surely, 2^72552553 is an apocalyptic number.

It is an amenable number.

72552553 is a deficient number, since it is larger than the sum of its proper divisors (1).

72552553 is an equidigital number, since it uses as much as digits as its factorization.

72552553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52500, while the sum is 34.

The square root of 72552553 is about 8517.7786423457. The cubic root of 72552553 is about 417.0782727968.

The spelling of 72552553 in words is "seventy-two million, five hundred fifty-two thousand, five hundred fifty-three".