157581323 has 2 divisors, whose sum is σ = 157581324. Its totient is φ = 157581322.

The previous prime is 157581317. The next prime is 157581337. The reversal of 157581323 is 323185751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157581323 - 2¹⁸ = 157319179 is a prime.

It is not a weakly prime, because it can be changed into another prime (157581223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78790661 + 78790662.

It is an arithmetic number, because the mean of its divisors is an integer number (78790662).

Almost surely, 2^157581323 is an apocalyptic number.

157581323 is a deficient number, since it is larger than the sum of its proper divisors (1).

157581323 is an equidigital number, since it uses as much as digits as its factorization.

157581323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 157581323 is about 12553.1399657616. The cubic root of 157581323 is about 540.1340807885.

The spelling of 157581323 in words is "one hundred fifty-seven million, five hundred eighty-one thousand, three hundred twenty-three".