157303681 has 2 divisors, whose sum is σ = 157303682. Its totient is φ = 157303680.

The previous prime is 157303651. The next prime is 157303691. The reversal of 157303681 is 186303751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153363456 + 3940225 = 12384^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 157303681 - 2⁵ = 157303649 is a prime.

It is a super-2 number, since 2×157303681² = 49488896112299522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157303651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78651840 + 78651841.

It is an arithmetic number, because the mean of its divisors is an integer number (78651841).

Almost surely, 2^157303681 is an apocalyptic number.

It is an amenable number.

157303681 is a deficient number, since it is larger than the sum of its proper divisors (1).

157303681 is an equidigital number, since it uses as much as digits as its factorization.

157303681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 157303681 is about 12542.0764229852. The cubic root of 157303681 is about 539.8166741662.

The spelling of 157303681 in words is "one hundred fifty-seven million, three hundred three thousand, six hundred eighty-one".