157795181 has 2 divisors, whose sum is σ = 157795182. Its totient is φ = 157795180.

The previous prime is 157795091. The next prime is 157795189. The reversal of 157795181 is 181597751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157502500 + 292681 = 12550^2 + 541^2 .

It is an emirp because it is prime and its reverse (181597751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157795181 is a prime.

It is a super-2 number, since 2×157795181² = 49798638293645522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157795189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78897590 + 78897591.

It is an arithmetic number, because the mean of its divisors is an integer number (78897591).

Almost surely, 2^157795181 is an apocalyptic number.

It is an amenable number.

157795181 is a deficient number, since it is larger than the sum of its proper divisors (1).

157795181 is an equidigital number, since it uses as much as digits as its factorization.

157795181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 44.

The square root of 157795181 is about 12561.6551855239. The cubic root of 157795181 is about 540.3783140021.

The spelling of 157795181 in words is "one hundred fifty-seven million, seven hundred ninety-five thousand, one hundred eighty-one".