73157533 has 2 divisors, whose sum is σ = 73157534. Its totient is φ = 73157532.

The previous prime is 73157453. The next prime is 73157561. The reversal of 73157533 is 33575137.

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., 46963609 + 26193924 = 6853^2 + 5118^2 .

It is an emirp because it is prime and its reverse (33575137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73157533 - 2¹³ = 73149341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73107533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36578766 + 36578767.

It is an arithmetic number, because the mean of its divisors is an integer number (36578767).

Almost surely, 2^73157533 is an apocalyptic number.

It is an amenable number.

73157533 is a deficient number, since it is larger than the sum of its proper divisors (1).

73157533 is an equidigital number, since it uses as much as digits as its factorization.

73157533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33075, while the sum is 34.

The square root of 73157533 is about 8553.2176986208. The cubic root of 73157533 is about 418.2343355350.

The spelling of 73157533 in words is "seventy-three million, one hundred fifty-seven thousand, five hundred thirty-three".