157171250321 has 2 divisors, whose sum is σ = 157171250322. Its totient is φ = 157171250320.

The previous prime is 157171250309. The next prime is 157171250359. The reversal of 157171250321 is 123052171751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138952999696 + 18218250625 = 372764^2 + 134975^2 .

It is an emirp because it is prime and its reverse (123052171751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157171250321 - 2²² = 157167056017 is a prime.

It is not a weakly prime, because it can be changed into another prime (157171253321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78585625160 + 78585625161.

It is an arithmetic number, because the mean of its divisors is an integer number (78585625161).

Almost surely, 2^157171250321 is an apocalyptic number.

It is an amenable number.

157171250321 is a deficient number, since it is larger than the sum of its proper divisors (1).

157171250321 is an equidigital number, since it uses as much as digits as its factorization.

157171250321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 35.

The spelling of 157171250321 in words is "one hundred fifty-seven billion, one hundred seventy-one million, two hundred fifty thousand, three hundred twenty-one".