157070281 has 2 divisors, whose sum is σ = 157070282. Its totient is φ = 157070280.

The previous prime is 157070237. The next prime is 157070341. The reversal of 157070281 is 182070751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84548025 + 72522256 = 9195^2 + 8516^2 .

It is an emirp because it is prime and its reverse (182070751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157070281 - 2¹⁹ = 156545993 is a prime.

It is a super-2 number, since 2×157070281² = 49342146346837922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157070201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78535140 + 78535141.

It is an arithmetic number, because the mean of its divisors is an integer number (78535141).

Almost surely, 2^157070281 is an apocalyptic number.

It is an amenable number.

157070281 is a deficient number, since it is larger than the sum of its proper divisors (1).

157070281 is an equidigital number, since it uses as much as digits as its factorization.

157070281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 157070281 is about 12532.7682895680. The cubic root of 157070281 is about 539.5495569217.

The spelling of 157070281 in words is "one hundred fifty-seven million, seventy thousand, two hundred eighty-one".