157543313 has 4 divisors (see below), whose sum is σ = 158156580. Its totient is φ = 156930048.

The previous prime is 157543273. The next prime is 157543327. The reversal of 157543313 is 313345751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313345751 = 17 ⋅18432103.

It can be written as a sum of positive squares in 2 ways, for example, as 82755409 + 74787904 = 9097^2 + 8648^2 .

It is a cyclic number.

It is not a de Polignac number, because 157543313 - 2¹⁸ = 157281169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157543313.

It is not an unprimeable number, because it can be changed into a prime (157543343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306248 + ... + 306761.

It is an arithmetic number, because the mean of its divisors is an integer number (39539145).

Almost surely, 2^157543313 is an apocalyptic number.

It is an amenable number.

157543313 is a deficient number, since it is larger than the sum of its proper divisors (613267).

157543313 is an equidigital number, since it uses as much as digits as its factorization.

157543313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613266.

The product of its digits is 18900, while the sum is 32.

The square root of 157543313 is about 12551.6259106141. The cubic root of 157543313 is about 540.0906489339.

The spelling of 157543313 in words is "one hundred fifty-seven million, five hundred forty-three thousand, three hundred thirteen".