157301321 has 2 divisors, whose sum is σ = 157301322. Its totient is φ = 157301320.

The previous prime is 157301303. The next prime is 157301363. The reversal of 157301321 is 123103751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145467721 + 11833600 = 12061^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 157301321 - 2¹⁴ = 157284937 is a prime.

It is not a weakly prime, because it can be changed into another prime (157301821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78650660 + 78650661.

It is an arithmetic number, because the mean of its divisors is an integer number (78650661).

Almost surely, 2^157301321 is an apocalyptic number.

It is an amenable number.

157301321 is a deficient number, since it is larger than the sum of its proper divisors (1).

157301321 is an equidigital number, since it uses as much as digits as its factorization.

157301321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 157301321 is about 12541.9823393274. The cubic root of 157301321 is about 539.8139745606.

The spelling of 157301321 in words is "one hundred fifty-seven million, three hundred one thousand, three hundred twenty-one".