72253541 has 2 divisors, whose sum is σ = 72253542. Its totient is φ = 72253540.

The previous prime is 72253513. The next prime is 72253543. The reversal of 72253541 is 14535227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 17048641 = 7430^2 + 4129^2 .

It is a cyclic number.

It is not a de Polignac number, because 72253541 - 2⁶ = 72253477 is a prime.

Together with 72253543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72253543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36126770 + 36126771.

It is an arithmetic number, because the mean of its divisors is an integer number (36126771).

Almost surely, 2^72253541 is an apocalyptic number.

It is an amenable number.

72253541 is a deficient number, since it is larger than the sum of its proper divisors (1).

72253541 is an equidigital number, since it uses as much as digits as its factorization.

72253541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 72253541 is about 8500.2082915656. The cubic root of 72253541 is about 416.5045134011.

Adding to 72253541 its reverse (14535227), we get a palindrome (86788768).

The spelling of 72253541 in words is "seventy-two million, two hundred fifty-three thousand, five hundred forty-one".