257151161 has 2 divisors, whose sum is σ = 257151162. Its totient is φ = 257151160.

The previous prime is 257151101. The next prime is 257151211. The reversal of 257151161 is 161151752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238393600 + 18757561 = 15440^2 + 4331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257151161 is a prime.

It is a super-2 number, since 2×257151161² = 132253439207295842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257151101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128575580 + 128575581.

It is an arithmetic number, because the mean of its divisors is an integer number (128575581).

Almost surely, 2^257151161 is an apocalyptic number.

It is an amenable number.

257151161 is a deficient number, since it is larger than the sum of its proper divisors (1).

257151161 is an equidigital number, since it uses as much as digits as its factorization.

257151161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 29.

The square root of 257151161 is about 16035.9334308920. The cubic root of 257151161 is about 635.9107447298.

The spelling of 257151161 in words is "two hundred fifty-seven million, one hundred fifty-one thousand, one hundred sixty-one".